{"id":2785,"date":"2024-06-30T11:05:03","date_gmt":"2024-06-30T11:05:03","guid":{"rendered":"https:\/\/bitcoin-zukan.com\/?p=2785"},"modified":"2024-06-30T11:05:06","modified_gmt":"2024-06-30T11:05:06","slug":"hacking","status":"publish","type":"post","link":"https:\/\/bitcoin-zukan.com\/en\/learn-en\/hacking\/","title":{"rendered":"Bitcoin Hacking Incidents in Japan"},"content":{"rendered":"<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2024\/01\/Bitcoin-1.jpg\" alt=\"\u30d3\u30c3\u30c8\u30b3\u30a4\u30f3\u306e\u30cf\u30c3\u30ad\u30f3\u30b0\u4e8b\u4ef6\uff5c\u306a\u305c\u6d41\u51fa\uff1f\u65e5\u672c\u306e\u53d6\u5f15\u6240\u3067\u8d77\u304d\u305f\u4eee\u60f3\u901a\u8ca8\u306e\u76d7\u96e3\" class=\"wp-image-1509\" srcset=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2024\/01\/Bitcoin-1.jpg 1200w, https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2024\/01\/Bitcoin-1-300x169.jpg 300w, https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2024\/01\/Bitcoin-1-1024x576.jpg 1024w, https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2024\/01\/Bitcoin-1-768x432.jpg 768w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n<\/div>\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon2\">\r\n\t<div class=\"st-kaiwa-face\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/fiat-right-1.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name\">\u30d5\u30a3\u30a2\u30c3\u30c8<\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-area\">\r\n\t\t<div class=\"st-kaiwa-hukidashi\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">I wish I knew about the Bitcoin hacking incidents.<\/p>\n\n\n\n<p class=\"\">Why would Bitcoin be stolen?<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<p class=\"\">Hackers targeting Bitcoin and other virtual currencies are active worldwide, and Japanese exchanges and users have also fallen victim to hacking.<\/p>\n\n\n\n<p class=\"\">To protect your Bitcoin, it&#8217;s crucial to understand the hacking incidents and methods that have occurred in the past.<\/p>\n\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon1\">\r\n\t<div class=\"st-kaiwa-area2\">\r\n\t\t<div class=\"st-kaiwa-hukidashi2\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">In this article, I&#8217;ll explain why Bitcoin hacking happens and review past virtual currency hacking incidents at Japanese exchanges.<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-face2\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/badger-left-3.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name2\">\u30d0\u30c3\u30b8\u30e3\u30fc\u541b<\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<p class=\"is-style-st-paragraph-memo\">This article was written in Japanese and converted to English using a translation tool.<br>Date of writing (Japanese version): December 2023<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Why Bitcoin Hacking Happens?<\/h2>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"960\" height=\"576\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/12\/hacking-2.jpg\" alt=\"\u30d3\u30c3\u30c8\u30b3\u30a4\u30f3\u306e\u30cf\u30c3\u30ad\u30f3\u30b0\u306f\u306a\u305c\u8d77\u304d\u308b\u306e\u304b\" class=\"wp-image-1395\" srcset=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/12\/hacking-2.jpg 960w, https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/12\/hacking-2-300x180.jpg 300w, https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/12\/hacking-2-768x461.jpg 768w\" sizes=\"(max-width: 960px) 100vw, 960px\" \/><\/figure>\n<\/div>\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon2\">\r\n\t<div class=\"st-kaiwa-face\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/fiat-right-1.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name\">\u30d5\u30a3\u30a2\u30c3\u30c8<\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-area\">\r\n\t\t<div class=\"st-kaiwa-hukidashi\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">Why do Bitcoin hacks happen?<\/p>\n\n\n\n<p class=\"\">Is there something wrong with Bitcoin itself?<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon7\">\r\n\t<div class=\"st-kaiwa-area2\">\r\n\t\t<div class=\"st-kaiwa-hukidashi2\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">Bitcoin hacks occur mainly due to security issues with the virtual currency exchanges and wallets that store bitcoins.<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-face2\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/badger-left-2.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name2\">\u30d0\u30c3\u30b8\u30e3\u30fc\u541b<\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Security of Exchanges and Wallets is Breached<\/h3>\n\n\n\n<p class=\"\">Bitcoin hacking occurs when the security of a virtual currency exchange or personal wallet is compromised.<\/p>\n\n\n\n<p class=\"\">Hackers often target &#8220;hot wallets&#8221; connected to the Internet to execute their attacks.<br>They exploit security weaknesses and system vulnerabilities to steal Bitcoin and other virtual currencies.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th><\/th><th class=\"has-text-align-center\" data-align=\"center\"><strong>Hot Wallets<\/strong><\/th><th class=\"has-text-align-center\" data-align=\"center\"><strong>Cold Wallets<\/strong><\/th><\/tr><\/thead><tbody><tr><td>Management<\/td><td class=\"has-text-align-center\" data-align=\"center\">Online management<\/td><td class=\"has-text-align-center\" data-align=\"center\">Offline management<\/td><\/tr><tr><td>Convenience<\/td><td class=\"has-text-align-center\" data-align=\"center\">Immediately available for transactions<\/td><td class=\"has-text-align-center\" data-align=\"center\">Transactions take time<\/td><\/tr><tr><td>Personal Wallets<\/td><td class=\"has-text-align-center\" data-align=\"center\">Many are free<\/td><td class=\"has-text-align-center\" data-align=\"center\">Device purchases are common<\/td><\/tr><tr><td>Security<\/td><td class=\"has-text-align-center\" data-align=\"center\">High hacking risk<\/td><td class=\"has-text-align-center\" data-align=\"center\">Low hacking risk<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<div class=\"wp-block-st-blocks-my-box st-mybox has-title\" style=\"background-color:#fff;border-color:#757575\"><p class=\"st-mybox-title\" style=\"color:#424242;font-weight:bold;text-shadow:#fff 3px 0px 0px, #fff 2.83487px .981584px 0px, #fff 2.35766px 1.85511px 0px, #fff 1.62091px 2.52441px 0px, #fff .705713px 2.91581px 0px, #fff -0.287171px 2.98622px 0px, #fff -1.24844px 2.72789px 0px, #fff -2.07227px 2.16926px 0px, #fff -2.66798px 1.37182px 0px, #fff -2.96998px .42336px 0px, #fff -2.94502px -0.571704px 0px, #fff -2.59586px -1.50383px 0px, #fff -1.96093px -2.27041px 0px, #fff -1.11013px -2.78704px 0px, #fff -0.137119px -2.99686px 0px, #fff .850987px -2.87677px 0px, #fff 1.74541px -2.43999px 0px, #fff 2.44769px -1.73459px 0px, #fff 2.88051px -0.838246px 0px;background:linear-gradient(0deg, #fff 0%, #fff 55%, rgba(0, 0, 0, 0) 55%, rgba(0, 0, 0, 0) 100%)\"><span class=\"st-mybox-title-text\">About Cold Wallets on Exchanges<\/span><\/p><div class=\"st-in-mybox\">\n<ul class=\"wp-block-list\">\n<li class=\"\">Developing a cold wallet is not straightforward and requires specialized development work for each type of virtual currency.<\/li>\n\n\n\n<li class=\"\">Periodic upgrades are needed, which requires significant resources.<\/li>\n\n\n\n<li class=\"\">Storing virtual currency in cold wallets reduces the convenience of services for users (immediate transfers become more challenging), so increasing security often means reducing immediacy.<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon6\">\r\n\t<div class=\"st-kaiwa-face\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/fiat-right-3.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name\">\u30d5\u30a3\u30a2\u30c3\u30c8<\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-area\">\r\n\t\t<div class=\"st-kaiwa-hukidashi\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">So, many hacks on exchanges occur when hot wallets are targeted\u2026<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon1\">\r\n\t<div class=\"st-kaiwa-area2\">\r\n\t\t<div class=\"st-kaiwa-hukidashi2\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">Many exchanges keep the majority of their assets (80%+) in cold wallets.<\/p>\n\n\n\n<p class=\"\">The portion expected to be used for daily transactions is kept in hot wallets, balancing smooth transactions with security.<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-face2\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/badger-left-3.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name2\">\u30d0\u30c3\u30b8\u30e3\u30fc\u541b<\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Targeting Users with Low Security Awareness<\/h3>\n\n\n\n<p class=\"\">Personal virtual currency wallets can also be targeted by hackers, and if security measures are inadequate, assets are at risk of being stolen.<\/p>\n\n\n\n<p class=\"\">In addition to wallet vulnerabilities, a lack of personal security awareness is another factor that can lead to hacking incidents.<\/p>\n\n\n\n<div class=\"wp-block-st-blocks-my-box st-mybox has-title\" style=\"background-color:#fff;border-color:#757575\"><p class=\"st-mybox-title\" style=\"color:#424242;font-weight:bold;text-shadow:#fff 3px 0px 0px, #fff 2.83487px .981584px 0px, #fff 2.35766px 1.85511px 0px, #fff 1.62091px 2.52441px 0px, #fff .705713px 2.91581px 0px, #fff -0.287171px 2.98622px 0px, #fff -1.24844px 2.72789px 0px, #fff -2.07227px 2.16926px 0px, #fff -2.66798px 1.37182px 0px, #fff -2.96998px .42336px 0px, #fff -2.94502px -0.571704px 0px, #fff -2.59586px -1.50383px 0px, #fff -1.96093px -2.27041px 0px, #fff -1.11013px -2.78704px 0px, #fff -0.137119px -2.99686px 0px, #fff .850987px -2.87677px 0px, #fff 1.74541px -2.43999px 0px, #fff 2.44769px -1.73459px 0px, #fff 2.88051px -0.838246px 0px;background:linear-gradient(0deg, #fff 0%, #fff 55%, rgba(0, 0, 0, 0) 55%, rgba(0, 0, 0, 0) 100%)\"><span class=\"st-mybox-title-text\">Hacking of Personal Wallets (Examples)<\/span><\/p><div class=\"st-in-mybox\">\n<ul class=\"wp-block-list\">\n<li class=\"\"><strong>Phishing Scams<\/strong><br>\u2192Hackers pose as legitimate sources to direct users to fraudulent URLs, aiming to steal personal information and assets.<\/li>\n\n\n\n<li class=\"\"><strong>Malware<\/strong><br>\u2192Devices are infected with malicious software to hijack and control them.<\/li>\n\n\n\n<li class=\"\">Wallet Weaknesses are Exploited<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon5\">\r\n\t<div class=\"st-kaiwa-face\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/fiat-right-5.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name\">\u30d5\u30a3\u30a2\u30c3\u30c8<\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-area\">\r\n\t\t<div class=\"st-kaiwa-hukidashi\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">Exchanges are likely to be targeted by hackers because they hold large amounts of assets, but there are many incidents where personal wallets are targeted as well\u2026<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon7\">\r\n\t<div class=\"st-kaiwa-area2\">\r\n\t\t<div class=\"st-kaiwa-hukidashi2\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">It is very important to manage your bitcoins in your own wallet, but if you manage it improperly, you can fall victim to hacking.<\/p>\n\n\n\n<p class=\"\">You should never disclose your wallet&#8217;s private key or passphrase to anyone under any circumstances.<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-face2\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/badger-left-2.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name2\">\u30d0\u30c3\u30b8\u30e3\u30fc\u541b<\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Bitcoin Itself is Not the Problem<\/h3>\n\n\n\n<p class=\"\">When Bitcoin hacking occurs, the cause is often related to storage methods, not the technology of Bitcoin itself.<\/p>\n\n\n\n<p class=\"\">Bitcoin uses a combination of decentralized mechanisms and encryption technology, making it extremely difficult to falsify transaction records.<br>*Decentralized\u2026the opposite of centralized, where functions are distributed across multiple computers, enhancing security and reliability.<\/p>\n\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon6\">\r\n\t<div class=\"st-kaiwa-face\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/fiat-right-3.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name\">\u30d5\u30a3\u30a2\u30c3\u30c8<\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-area\">\r\n\t\t<div class=\"st-kaiwa-hukidashi\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">So, Bitcoin itself is not being hacked.<\/p>\n\n\n\n<p class=\"\">To use an analogy, it&#8217;s like saying that the money in the bank was stolen because there was a problem with the bank&#8217;s vault, not the money itself.<br>Or that the vault was left unlocked.<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon1\">\r\n\t<div class=\"st-kaiwa-area2\">\r\n\t\t<div class=\"st-kaiwa-hukidashi2\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">Exactly. It&#8217;s a very dangerous situation when exchanges store large amounts of money in one place without proper security measures.<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-face2\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/badger-left-3.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name2\">\u30d0\u30c3\u30b8\u30e3\u30fc\u541b<\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Bitcoin &amp; Virtual Currency Hacking Incidents at Japanese Exchanges<\/h2>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"960\" height=\"576\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/12\/hacking-3.jpg\" alt=\"\u65e5\u672c\u306e\u53d6\u5f15\u6240\u3067\u8d77\u304d\u305f\u30d3\u30c3\u30c8\u30b3\u30a4\u30f3\uff06\u4eee\u60f3\u901a\u8ca8\u306e\u30cf\u30c3\u30ad\u30f3\u30b0\u4e8b\u4ef6\u3010\u4e00\u89a7\u3011\" class=\"wp-image-1396\" srcset=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/12\/hacking-3.jpg 960w, https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/12\/hacking-3-300x180.jpg 300w, https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/12\/hacking-3-768x461.jpg 768w\" sizes=\"(max-width: 960px) 100vw, 960px\" \/><\/figure>\n<\/div>\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon2\">\r\n\t<div class=\"st-kaiwa-face\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/fiat-right-1.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name\">\u30d5\u30a3\u30a2\u30c3\u30c8<\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-area\">\r\n\t\t<div class=\"st-kaiwa-hukidashi\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">I wish I knew about all the Bitcoin hacking incidents that happened on Japanese exchanges.<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon1\">\r\n\t<div class=\"st-kaiwa-area2\">\r\n\t\t<div class=\"st-kaiwa-hukidashi2\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">I&#8217;ve compiled a list of major virtual currency hacking incidents in Japan.<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-face2\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/badger-left-3.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name2\">\u30d0\u30c3\u30b8\u30e3\u30fc\u541b<\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th class=\"has-text-align-center\" data-align=\"center\">Exchange<\/th><th class=\"has-text-align-center\" data-align=\"center\"><strong>Amount of Damage (Rate at the Time)<\/strong><\/th><th class=\"has-text-align-center\" data-align=\"center\"><strong>Year of Occurrence<\/strong><\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">Mt.GOX<\/td><td class=\"has-text-align-center\" data-align=\"center\">47 billion yen<\/td><td class=\"has-text-align-center\" data-align=\"center\">February 2014<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Coincheck<\/td><td class=\"has-text-align-center\" data-align=\"center\">58 billion yen<\/td><td class=\"has-text-align-center\" data-align=\"center\">January 2018<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Zaif<\/td><td class=\"has-text-align-center\" data-align=\"center\">6.7 billion yen<\/td><td class=\"has-text-align-center\" data-align=\"center\">September 2018<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">BITPOINT<\/td><td class=\"has-text-align-center\" data-align=\"center\">3.5 billion yen<\/td><td class=\"has-text-align-center\" data-align=\"center\">July 2019<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Liquid<\/td><td class=\"has-text-align-center\" data-align=\"center\">6.9 billion yen<\/td><td class=\"has-text-align-center\" data-align=\"center\">August 2021<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">DMM Bitcoin<\/td><td class=\"has-text-align-center\" data-align=\"center\">48.2 billion yen<\/td><td class=\"has-text-align-center\" data-align=\"center\">May 2024<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Mt. Gox<\/h3>\n\n\n<div class=\"wp-block-image is-style-st-photoline\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"722\" height=\"442\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/hacking0.jpg\" alt=\"\u30de\u30a6\u30f3\u30c8\u30b4\u30c3\u30af\u30b9\u4e8b\u4ef6\" class=\"wp-image-619\" srcset=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/hacking0.jpg 722w, https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/hacking0-300x184.jpg 300w\" sizes=\"(max-width: 722px) 100vw, 722px\" \/><figcaption class=\"wp-element-caption\">Source\uff1a<a href=\"https:\/\/www.mtgox.com\/img\/pdf\/20140424_announce_qa_ja.pdf\" data-type=\"link\" data-id=\"https:\/\/www.mtgox.com\/img\/pdf\/20140424_announce_qa_ja.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">MTGOX<\/a><\/figcaption><\/figure>\n<\/div>\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th class=\"has-text-align-center\" data-align=\"center\"><\/th><th class=\"has-text-align-center\" data-align=\"center\"><strong>Mt. Gox hack<\/strong><\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">Date<\/td><td class=\"has-text-align-center\" data-align=\"center\">February 2014<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Amount of damage<\/td><td class=\"has-text-align-center\" data-align=\"center\">Approx. 47 billion yen (rate at the time)<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Outflowed assets<\/td><td class=\"has-text-align-center\" data-align=\"center\">Outflowed assets held by customers: Approx. 750,000 BTC<br>Company-owned assets: Approx. 100,000 BTC<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Security at the time<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u30fbOnline management of assets.<br>\u30fbCustomer assets and company assets are not managed separately.<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Compensation situation<\/td><td class=\"has-text-align-center\" data-align=\"center\">Repayment due date extended to the end of October 2024<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon7\">\r\n\t<div class=\"st-kaiwa-area2\">\r\n\t\t<div class=\"st-kaiwa-hukidashi2\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">Mt. Gox, one of the largest exchanges in the world at the time, was massively hacked and collapsed shortly after.<\/p>\n\n\n\n<p class=\"\">Most of the bitcoins were managed in hot wallets, but it was later discovered that about 140,000 BTC remained in cold wallets and is expected to be used to reimburse users in the future.<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-face2\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/badger-left-2.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name2\">\u30d0\u30c3\u30b8\u30e3\u30fc\u541b<\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon6\">\r\n\t<div class=\"st-kaiwa-face\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/fiat-right-3.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name\">\u30d5\u30a3\u30a2\u30c3\u30c8<\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-area\">\r\n\t\t<div class=\"st-kaiwa-hukidashi\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">The representatives of Mt. Gox have been arrested and acquitted. I&#8217;m wondering how the reimbursement will be made to the victims of the hack.<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Coincheck<\/h3>\n\n\n<div class=\"wp-block-image is-style-st-photoline\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"1087\" height=\"460\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/hacking1.jpg\" alt=\"\u30b3\u30a4\u30f3\u30c1\u30a7\u30c3\u30af\u4e8b\u4ef6\" class=\"wp-image-620\" srcset=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/hacking1.jpg 1087w, https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/hacking1-300x127.jpg 300w, https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/hacking1-1024x433.jpg 1024w, https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/hacking1-768x325.jpg 768w\" sizes=\"(max-width: 1087px) 100vw, 1087px\" \/><figcaption class=\"wp-element-caption\">Source\uff1a<a href=\"https:\/\/coincheck.com\/ja\/info\/faq_nem\" data-type=\"link\" data-id=\"https:\/\/coincheck.com\/ja\/info\/faq_nem\" target=\"_blank\" rel=\"noreferrer noopener\">\u30b3\u30a4\u30f3\u30c1\u30a7\u30c3\u30af<\/a><\/figcaption><\/figure>\n<\/div>\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th class=\"has-text-align-center\" data-align=\"center\"><\/th><th class=\"has-text-align-center\" data-align=\"center\"><strong><strong>Coincheck hacking<\/strong><\/strong><\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">Date<\/td><td class=\"has-text-align-center\" data-align=\"center\">January 26, 2018<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Amount of damage<\/td><td class=\"has-text-align-center\" data-align=\"center\">approximately 58 billion yen (rate at the time)<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Outflowed assets<\/td><td class=\"has-text-align-center\" data-align=\"center\">526.3 million NEM (XEM)<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Security at the time<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u30fbAll NEMs were managed in a hot wallet for security at the time.<br>\u30fbMultisig was not implemented (a technology requiring multiple signatures for money transfers).<br>\u30fbAn employee&#8217;s terminal was infected with malware, and the private key of XEM was stolen by remote control.<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Compensation situation<\/td><td class=\"has-text-align-center\" data-align=\"center\">refunded to the customer&#8217;s wallet at Coincheck in Japanese yen.<br>Compensation amount: 88.549 yen x number of holdings as of 23:59:59 on January 26, 2018.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon1\">\r\n\t<div class=\"st-kaiwa-area2\">\r\n\t\t<div class=\"st-kaiwa-hukidashi2\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">Of all the hacking incidents in Japan, the Coincheck incident was the most damaging, affecting 260,000 holders.<\/p>\n\n\n\n<p class=\"\">The fact that all NEMs were managed in hot wallets led to the massive outflow.<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-face2\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/badger-left-3.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name2\">\u30d0\u30c3\u30b8\u30e3\u30fc\u541b<\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon5\">\r\n\t<div class=\"st-kaiwa-face\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/fiat-right-5.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name\">\u30d5\u30a3\u30a2\u30c3\u30c8<\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-area\">\r\n\t\t<div class=\"st-kaiwa-hukidashi\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">Many people were disadvantaged by the taxation system because compensation was made in Japanese yen, which is treated as profit-making\u2026<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Zaif<\/h3>\n\n\n<div class=\"wp-block-image is-style-st-photoline\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"889\" height=\"338\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/hacking2.jpg\" alt=\"Zaif\u30cf\u30c3\u30ad\u30f3\u30b0\u4e8b\u4ef6\" class=\"wp-image-621\" srcset=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/hacking2.jpg 889w, https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/hacking2-300x114.jpg 300w, https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/hacking2-768x292.jpg 768w\" sizes=\"(max-width: 889px) 100vw, 889px\" \/><figcaption class=\"wp-element-caption\">Source\uff1a<a href=\"https:\/\/corp.zaif.jp\/info\/10789\/\" data-type=\"link\" data-id=\"https:\/\/corp.zaif.jp\/info\/10789\/\" target=\"_blank\" rel=\"noreferrer noopener\">Zaif<\/a><\/figcaption><\/figure>\n<\/div>\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th class=\"has-text-align-center\" data-align=\"center\"><\/th><th class=\"has-text-align-center\" data-align=\"center\">Zaif hacking<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">Date<\/td><td class=\"has-text-align-center\" data-align=\"center\">September 14, 2018<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Amount of damage<\/td><td class=\"has-text-align-center\" data-align=\"center\">approximately 6.7 billion yen (rate at the time)<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Outflowed assets<\/td><td class=\"has-text-align-center\" data-align=\"center\">Bitcoin: 2,723.4 BTC<br>Monacoin: 5,911,859.3 MONA<br>Bitcoin Cash: 40,360.0 BCH<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Security at the time<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u30fbHot wallets for security deposits and withdrawals at the time were affected.<br>\u30fbCompensation for fraud detection took 3 days.<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Compensation situation<\/td><td class=\"has-text-align-center\" data-align=\"center\">BTC and BCH were compensated in virtual currency.<br>60% of MONA was compensated in MONA and 40% was compensated in Japanese yen.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon6\">\r\n\t<div class=\"st-kaiwa-face\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/fiat-right-3.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name\">\u30d5\u30a3\u30a2\u30c3\u30c8<\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-area\">\r\n\t\t<div class=\"st-kaiwa-hukidashi\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">Less than a year after the Coincheck hack, another Japanese exchange was hacked\u2026<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon7\">\r\n\t<div class=\"st-kaiwa-area2\">\r\n\t\t<div class=\"st-kaiwa-hukidashi2\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">Just as the FSA issued business improvement orders to a number of exchanges and the virtual currency industry was about to emerge from its stagnation, there&#8217;s another hacking incident.<\/p>\n\n\n\n<p class=\"\">Zaif had received business improvement orders in March and June 2018, but that still didn&#8217;t prevent the incident.<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-face2\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/badger-left-2.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name2\">\u30d0\u30c3\u30b8\u30e3\u30fc\u541b<\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">BITPOINT<\/h3>\n\n\n<div class=\"wp-block-image is-style-st-photoline\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"1187\" height=\"425\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/hacking3.jpg\" alt=\"BITPOINT\u30cf\u30c3\u30ad\u30f3\u30b0\u4e8b\u4ef6\" class=\"wp-image-622\" srcset=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/hacking3.jpg 1187w, https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/hacking3-300x107.jpg 300w, https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/hacking3-1024x367.jpg 1024w, https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/hacking3-768x275.jpg 768w\" sizes=\"(max-width: 1187px) 100vw, 1187px\" \/><figcaption class=\"wp-element-caption\">Source\uff1a<a href=\"https:\/\/contents.xj-storage.jp\/xcontents\/AS08938\/71b76148\/5f8c\/410e\/aa27\/fc5d773d894d\/140120200519418836.pdf\" data-type=\"link\" data-id=\"https:\/\/contents.xj-storage.jp\/xcontents\/AS08938\/71b76148\/5f8c\/410e\/aa27\/fc5d773d894d\/140120200519418836.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">\u30ea\u30df\u30c3\u30af\u30b9\u30dd\u30a4\u30f3\u30c8<\/a><\/figcaption><\/figure>\n<\/div>\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th class=\"has-text-align-center\" data-align=\"center\"><\/th><th class=\"has-text-align-center\" data-align=\"center\"><strong><strong>BITPOINT hacking<\/strong><\/strong><\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">Date<\/td><td class=\"has-text-align-center\" data-align=\"center\">July 12, 2019<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Amount of damage<\/td><td class=\"has-text-align-center\" data-align=\"center\">approximately 3.5 billion yen (rate at the time)<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Outflowed assets<\/td><td class=\"has-text-align-center\" data-align=\"center\">Bitcoin<br>Bitcoin Cash<br>Ethereum<br>Litecoin<br>XRP<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Security at the time<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u30fbAbout 20% of the portion managed by hot wallets at the time was hacked.<br>\u30fbHacking into the maintenance servers resulted in the leakage of private keys?<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Compensation situation<\/td><td class=\"has-text-align-center\" data-align=\"center\">Compensation in virtual currency occurred.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon6\">\r\n\t<div class=\"st-kaiwa-face\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/fiat-right-3.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name\">\u30d5\u30a3\u30a2\u30c3\u30c8<\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-area\">\r\n\t\t<div class=\"st-kaiwa-hukidashi\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">Almost half of the 110,000 account holders (about 50,000) have been affected\u2026<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon1\">\r\n\t<div class=\"st-kaiwa-area2\">\r\n\t\t<div class=\"st-kaiwa-hukidashi2\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">It seems they followed the industry&#8217;s self-regulation rules and kept the hot wallet managed portion below 20%.<br>However, it appears that most of the assets in the hot wallets have been leaked.<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-face2\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/badger-left-3.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name2\">\u30d0\u30c3\u30b8\u30e3\u30fc\u541b<\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Liquid<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th class=\"has-text-align-center\" data-align=\"center\"><\/th><th class=\"has-text-align-center\" data-align=\"center\"><strong>Liquid Hack<\/strong><\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">Date<\/td><td class=\"has-text-align-center\" data-align=\"center\">August 2021<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Amount of damage<\/td><td class=\"has-text-align-center\" data-align=\"center\">About 6.9 billion yen (at the rate at the time)<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Outflowed assets<\/td><td class=\"has-text-align-center\" data-align=\"center\">The wallet of the company&#8217;s Singapore subsidiary was compromised. <br>69 types of crypto assets were transferred outside the company.<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Security at the time<\/td><td class=\"has-text-align-center\" data-align=\"center\">Hot wallets for security and deposits\/withdrawals at the time were damaged.<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Compensation situation<\/td><td class=\"has-text-align-center\" data-align=\"center\">No customer assets were damaged.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon6\">\r\n\t<div class=\"st-kaiwa-face\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/fiat-right-3.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name\">\u30d5\u30a3\u30a2\u30c3\u30c8<\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-area\">\r\n\t\t<div class=\"st-kaiwa-hukidashi\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">Liquid Global&#8217;s Singapore subsidiary, QUOINE PTE, was compromised, right?<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon7\">\r\n\t<div class=\"st-kaiwa-area2\">\r\n\t\t<div class=\"st-kaiwa-hukidashi2\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">Liquid was acquired by FTX and became &#8220;FTX Japan&#8221;, but after FTX&#8217;s bankruptcy, they are shutting down their service.<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-face2\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/badger-left-2.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name2\">\u30d0\u30c3\u30b8\u30e3\u30fc\u541b<\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">DMM Bitcoin<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th class=\"has-text-align-center\" data-align=\"center\"><\/th><th class=\"has-text-align-center\" data-align=\"center\"><strong>DMM\u30d3\u30c3\u30c8\u30b3\u30a4\u30f3\u306e\u30cf\u30c3\u30ad\u30f3\u30b0<\/strong><\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">\u767a\u751f\u65e5<\/td><td class=\"has-text-align-center\" data-align=\"center\">2024\u5e745\u670831\u65e5<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\u88ab\u5bb3\u984d<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u7d04482\u5104\u5186\uff08\u5f53\u6642\u30ec\u30fc\u30c8\uff09<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\u6d41\u51fa\u8cc7\u7523<\/td><td class=\"has-text-align-center\" data-align=\"center\">4,502.9BTC<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\u5f53\u6642\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u539f\u56e0\u7a76\u660e\u4e2d\u203b2024\u5e746\u670824\u65e5\u6642\u70b9<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\u88dc\u511f\u72b6\u6cc1<\/td><td class=\"has-text-align-center\" data-align=\"center\">BTC\u3067\u306e\u88dc\u511f\u3092\u767a\u8868<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th class=\"has-text-align-center\" data-align=\"center\"><\/th><th class=\"has-text-align-center\" data-align=\"center\"><strong>DMM Bitcoin hack<\/strong><\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">Date<\/td><td class=\"has-text-align-center\" data-align=\"center\">May 31, 2024<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Amount of damage<\/td><td class=\"has-text-align-center\" data-align=\"center\">Approximately 48.2 billion yen (at the time of the incident)<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Outflowed assets<\/td><td class=\"has-text-align-center\" data-align=\"center\">4,502.9 BTC<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Security at the time<\/td><td class=\"has-text-align-center\" data-align=\"center\">Security issues are still being investigated as of June 24, 2024.<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Compensation situation<\/td><td class=\"has-text-align-center\" data-align=\"center\">Compensation in BTC has been announced.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon6\">\r\n\t<div class=\"st-kaiwa-face\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/fiat-right-3.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name\">\u30d5\u30a3\u30a2\u30c3\u30c8<\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-area\">\r\n\t\t<div class=\"st-kaiwa-hukidashi\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">So another massive outflow in Japan!<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon7\">\r\n\t<div class=\"st-kaiwa-area2\">\r\n\t\t<div class=\"st-kaiwa-hukidashi2\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">DMM Bitcoin immediately announced compensation in BTC and also announced the completion of BTC procurement equivalent to the outflow.<\/p>\n\n\n\n<p class=\"\">As of June 24, 2024, the details of the cause of the unauthorized outflow have not yet been revealed, so it will be interesting to see what happens next.<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-face2\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/badger-left-2.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name2\">\u30d0\u30c3\u30b8\u30e3\u30fc\u541b<\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">What happened after the Bitcoin theft?<\/h2>\n\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon2\">\r\n\t<div class=\"st-kaiwa-face\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/fiat-right-1.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name\">\u30d5\u30a3\u30a2\u30c3\u30c8<\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-area\">\r\n\t\t<div class=\"st-kaiwa-hukidashi\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">What happened after the Bitcoin theft?<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon7\">\r\n\t<div class=\"st-kaiwa-area2\">\r\n\t\t<div class=\"st-kaiwa-hukidashi2\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">Some exchanges haven&#8217;t made any progress on restitution, while others have implemented compensation.<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-face2\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/badger-left-2.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name2\">\u30d0\u30c3\u30b8\u30e3\u30fc\u541b<\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Compensation for the Mt. Gox Incident<\/h3>\n\n\n\n<p class=\"\">In the Mt. Gox hack in 2014, approximately 140,000 BTC were to be returned to victims.<\/p>\n\n\n\n<p class=\"\">However, there have been delays in the compensation plan, and the deadline has been extended by another year from the original compensation deadline of October 31, 2023.<br>One reason for the long post-bankruptcy process is that it is taking a long time because the company is dealing with an asset called &#8220;virtual currency,&#8221; which has never existed before.<\/p>\n\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon3\">\r\n\t<div class=\"st-kaiwa-face\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/fiat-right-2.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name\">\u30d5\u30a3\u30a2\u30c3\u30c8<\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-area\">\r\n\t\t<div class=\"st-kaiwa-hukidashi\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">Nine years after Mt. Gox&#8217;s bankruptcy, the prospects for debt collection are gradually improving\u2026<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon1\">\r\n\t<div class=\"st-kaiwa-area2\">\r\n\t\t<div class=\"st-kaiwa-hukidashi2\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">About 140,000 bitcoins were later discovered from Mt. Gox, and they will be used to compensate victims\u2026<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-face2\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/badger-left-3.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name2\">\u30d0\u30c3\u30b8\u30e3\u30fc\u541b<\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Leakage to North Korea<\/h3>\n\n\n<div class=\"wp-block-image is-style-st-photoline\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"958\" height=\"580\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/hacking4.jpg\" alt=\"\u5317\u671d\u9bae\u3078\u306e\u4eee\u60f3\u901a\u8ca8\u6d41\u51fa\" class=\"wp-image-623\" srcset=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/hacking4.jpg 958w, https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/hacking4-300x182.jpg 300w, https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/hacking4-768x465.jpg 768w\" sizes=\"(max-width: 958px) 100vw, 958px\" \/><figcaption class=\"wp-element-caption\">Source\uff1a<a href=\"https:\/\/www.chainalysis.com\/blog\/2022-biggest-year-ever-for-crypto-hacking\/\" data-type=\"link\" data-id=\"https:\/\/www.chainalysis.com\/blog\/2022-biggest-year-ever-for-crypto-hacking\/\" target=\"_blank\" rel=\"noreferrer noopener\">Chainalysis<\/a><br>Hacking Damage in the Virtual Currency Business (2016-2022)<\/figcaption><\/figure>\n<\/div>\n\n\n<p class=\"\">Hacking damage is on the rise worldwide, with a record number of damages occurring in 2022.<\/p>\n\n\n\n<p class=\"\">In addition, a group of North Korean hackers reportedly stole $721 million (about 98 billion yen) worth of virtual currency from Japan. It is estimated that 30% of the total global damage between 2017 and 2022 was from hacks in Japan.<\/p>\n\n\n\n<p class=\"\">Reference\uff1a<a href=\"https:\/\/www.nikkei.com\/article\/DGXZQOUC184V60Y3A110C2000000\/\" data-type=\"link\" data-id=\"https:\/\/www.nikkei.com\/article\/DGXZQOUC184V60Y3A110C2000000\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u5317\u671d\u9bae\u3001\u65e5\u672c\u304b\u3089\u4eee\u60f3\u901a\u8ca8980\u5104\u5186\u596a\u53d6\u3000\u4e16\u754c\u88ab\u5bb3\u984d\u306e3\u5272<\/a><\/p>\n\n\n\n<p class=\"\">North Korea&#8217;s hacking techniques are becoming more sophisticated every year, and in recent years, they appear to be expanding their attacks on Ethereum-based platforms.<\/p>\n\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon6\">\r\n\t<div class=\"st-kaiwa-face\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/fiat-right-3.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name\">\u30d5\u30a3\u30a2\u30c3\u30c8<\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-area\">\r\n\t\t<div class=\"st-kaiwa-hukidashi\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">It would be very scary to think if the hacked virtual currency was cashed in and used to fund missile development\u2026<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon7\">\r\n\t<div class=\"st-kaiwa-area2\">\r\n\t\t<div class=\"st-kaiwa-hukidashi2\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">Hackers are getting more sophisticated every year.<\/p>\n\n\n\n<p class=\"\">In recent years, many Ethereum-based virtual currencies have been targeted, and less secure DeFi platforms have been affected.<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-face2\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/badger-left-2.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name2\">\u30d0\u30c3\u30b8\u30e3\u30fc\u541b<\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n<div class=\"wp-block-image is-style-st-photoline\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"963\" height=\"455\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/hacking5.jpg\" alt=\"\u30cf\u30c3\u30ad\u30f3\u30b0\u4e8b\u4ef6\" class=\"wp-image-624\" srcset=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/hacking5.jpg 963w, https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/hacking5-300x142.jpg 300w, https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/hacking5-768x363.jpg 768w\" sizes=\"(max-width: 963px) 100vw, 963px\" \/><figcaption class=\"wp-element-caption\">Source\uff1a<a href=\"https:\/\/www.chainalysis.com\/blog\/2022-biggest-year-ever-for-crypto-hacking\/\" data-type=\"link\" data-id=\"https:\/\/www.chainalysis.com\/blog\/2022-biggest-year-ever-for-crypto-hacking\/\" target=\"_blank\" rel=\"noreferrer noopener\">Chainalysis<\/a><br>DeFi hacking (pink) spikes in 2021 and 2022<\/figcaption><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\">A Question and Answer on Bitcoin Hacking<\/h2>\n\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon2\">\r\n\t<div class=\"st-kaiwa-face\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/fiat-right-1.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name\">\u30d5\u30a3\u30a2\u30c3\u30c8<\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-area\">\r\n\t\t<div class=\"st-kaiwa-hukidashi\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">I wish I knew more about bitcoin hacking.<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon1\">\r\n\t<div class=\"st-kaiwa-area2\">\r\n\t\t<div class=\"st-kaiwa-hukidashi2\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">I&#8217;ll answer your questions about bitcoin hacking in a Q&amp;A format.<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-face2\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/badger-left-3.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name2\">\u30d0\u30c3\u30b8\u30e3\u30fc\u541b<\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">If my bitcoin gets hacked, do I have a guarantee?<\/h3>\n\n\n<div class=\"wp-block-image is-style-st-photoline\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"905\" height=\"307\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/hacking6.jpg\" alt=\"\u30cf\u30c3\u30ad\u30f3\u30b0\u306b\u4fdd\u8a3c\u306f\u3042\u308b\u306e\u304b\" class=\"wp-image-625\" srcset=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/hacking6.jpg 905w, https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/hacking6-300x102.jpg 300w, https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/hacking6-768x261.jpg 768w\" sizes=\"(max-width: 905px) 100vw, 905px\" \/><figcaption class=\"wp-element-caption\">Source\uff1a<a href=\"https:\/\/www.sbivc.co.jp\/crypto-assets\/risks\" data-type=\"link\" data-id=\"https:\/\/www.sbivc.co.jp\/crypto-assets\/risks\" target=\"_blank\" rel=\"noreferrer noopener\">SBIVC\u30c8\u30ec\u30fc\u30c9<\/a><\/figcaption><\/figure>\n<\/div>\n\n\n<p class=\"\">Unlike brokerage firms that trade stocks, virtual currency exchanges do not yet have a well-developed guarantee system.<\/p>\n\n\n\n<p class=\"\">The stock market is strictly monitored by the government and regulatory authorities. In Japan, there is a system to compensate up to 10 million yen in the event of a securities firm&#8217;s bankruptcy or other contingency.<br>On the other hand, virtual currency exchanges are not obligated to compensate users for losses caused by hacking, so there is no guarantee that they will be compensated.<\/p>\n\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon5\">\r\n\t<div class=\"st-kaiwa-face\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/fiat-right-5.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name\">\u30d5\u30a3\u30a2\u30c3\u30c8<\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-area\">\r\n\t\t<div class=\"st-kaiwa-hukidashi\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">Virtual currency is still a new market, so you have some concerns about the guarantee system compared to other investments.<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon7\">\r\n\t<div class=\"st-kaiwa-area2\">\r\n\t\t<div class=\"st-kaiwa-hukidashi2\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">It&#8217;s dangerous to place too much trust in virtual currency exchanges.<\/p>\n\n\n\n<p class=\"\">The once very popular foreign exchange &#8220;FTX&#8221; collapsed after a few days of turmoil, and many people are suffering because their assets have not been refunded.<br>No matter which exchange you use, be aware of contingency plans.<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-face2\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/badger-left-2.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name2\">\u30d0\u30c3\u30b8\u30e3\u30fc\u541b<\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">What if I receive an email requesting bitcoin?<\/h3>\n\n\n\n<p class=\"\">If you receive an email asking you to send Bitcoin, don&#8217;t comply with the request and ignore it.<br>Fictitious billing e-mails with content such as &#8220;We hacked your computer, send us bitcoin if you want us to delete the data we acquired&#8221; are circulating nationwide.<br>Source\uff1a<a href=\"https:\/\/www.police.pref.fukuoka.jp\/seian\/cyber\/soudan_jirei\/kyouhakumail.html\" data-type=\"link\" data-id=\"https:\/\/www.police.pref.fukuoka.jp\/seian\/cyber\/soudan_jirei\/kyouhakumail.html\" target=\"_blank\" rel=\"noreferrer noopener\">\u798f\u5ca1\u770c\u8b66\u5bdf<\/a><\/p>\n\n\n\n<p class=\"\">Also, do not respond to requests to send bitcoin via DMs on social networking sites.<\/p>\n\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon3\">\r\n\t<div class=\"st-kaiwa-face\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/fiat-right-2.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name\">\u30d5\u30a3\u30a2\u30c3\u30c8<\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-area\">\r\n\t\t<div class=\"st-kaiwa-hukidashi\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">If you get a message that makes you uneasy, you should not be in a hurry to go through with it.<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon7\">\r\n\t<div class=\"st-kaiwa-area2\">\r\n\t\t<div class=\"st-kaiwa-hukidashi2\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">In the virtual currency industry, hijacking and spoofing of social networking sites is a daily occurrence, so don&#8217;t send bitcoins even if someone you know asks for them.<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-face2\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/badger-left-2.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name2\">\u30d0\u30c3\u30b8\u30e3\u30fc\u541b<\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">[Summary] Bitcoin hacking incidents<\/h2>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"960\" height=\"576\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/12\/hacking-1.jpg\" alt=\"\u3010\u307e\u3068\u3081\u3011\u30d3\u30c3\u30c8\u30b3\u30a4\u30f3\u306e\u30cf\u30c3\u30ad\u30f3\u30b0\u4e8b\u4ef6\" class=\"wp-image-1394\" srcset=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/12\/hacking-1.jpg 960w, https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/12\/hacking-1-300x180.jpg 300w, https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/12\/hacking-1-768x461.jpg 768w\" sizes=\"(max-width: 960px) 100vw, 960px\" \/><\/figure>\n<\/div>\n\n\n<div class=\"wp-block-st-blocks-my-box st-mybox has-title\" style=\"background-color:#fff;border-color:#757575\"><p class=\"st-mybox-title\" style=\"color:#424242;font-weight:bold;text-shadow:#fff 3px 0px 0px, #fff 2.83487px .981584px 0px, #fff 2.35766px 1.85511px 0px, #fff 1.62091px 2.52441px 0px, #fff .705713px 2.91581px 0px, #fff -0.287171px 2.98622px 0px, #fff -1.24844px 2.72789px 0px, #fff -2.07227px 2.16926px 0px, #fff -2.66798px 1.37182px 0px, #fff -2.96998px .42336px 0px, #fff -2.94502px -0.571704px 0px, #fff -2.59586px -1.50383px 0px, #fff -1.96093px -2.27041px 0px, #fff -1.11013px -2.78704px 0px, #fff -0.137119px -2.99686px 0px, #fff .850987px -2.87677px 0px, #fff 1.74541px -2.43999px 0px, #fff 2.44769px -1.73459px 0px, #fff 2.88051px -0.838246px 0px;background:linear-gradient(0deg, #fff 0%, #fff 55%, rgba(0, 0, 0, 0) 55%, rgba(0, 0, 0, 0) 100%)\"><span class=\"st-mybox-title-text\">Key Points<\/span><\/p><div class=\"st-in-mybox\">\n<ul class=\"wp-block-list\">\n<li class=\"\">Hacking happens because the security of the exchange or wallet is breached.<\/li>\n\n\n\n<li class=\"\">Bitcoin itself is not the problem, but theft occurs due to lax storage methods.<\/li>\n\n\n\n<li class=\"\">Large-scale hacking incidents have also occurred at Japanese exchanges, such as Mt. Gox and Coincheck.<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon5\">\r\n\t<div class=\"st-kaiwa-face\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/fiat-right-5.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name\">\u30d5\u30a3\u30a2\u30c3\u30c8<\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-area\">\r\n\t\t<div class=\"st-kaiwa-hukidashi\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">Bitcoins are invisible data, and I somehow always thought that bitcoins themselves might be hacked.<\/p>\n\n\n\n<p class=\"\">I guess the cause of theft is due to the way bitcoins are stored, and if you store them in the wrong way, they can be easily stolen by hackers.<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon1\">\r\n\t<div class=\"st-kaiwa-area2\">\r\n\t\t<div class=\"st-kaiwa-hukidashi2\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">It&#8217;s really dangerous to manage a lot of funds in a hot wallet.<\/p>\n\n\n\n<p class=\"\">As a beginner, you can manage it on an exchange, but if you are getting used to bitcoin or dealing with large amounts, you should keep it in your own wallet.<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-face2\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/badger-left-3.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name2\">\u30d0\u30c3\u30b8\u30e3\u30fc\u541b<\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<div class=\"st-kaiwa-box clearfix wp-block-st-blocks-st-kaiwa kaiwaicon4\">\r\n\t<div class=\"st-kaiwa-face\"><img decoding=\"async\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/11\/fiat-right-4.png\" width=\"60px\">\r\n\t\t<div class=\"st-kaiwa-face-name\">\u30d5\u30a3\u30a2\u30c3\u30c8<\/div>\r\n\t<\/div>\r\n\t<div class=\"st-kaiwa-area\">\r\n\t\t<div class=\"st-kaiwa-hukidashi\"><div class=\"st-kaiwa-hukidashi-content\">\n<p class=\"\">I was kind of nervous about bitcoin because it sounds kind of difficult and I don&#8217;t really know what it is, but I wanted to know more about it.<\/p>\n\n\n\n<p class=\"\">I want to know more about Bitcoin!<\/p>\n<\/div><\/div>\r\n\t<\/div>\r\n<\/div>\n\n\n\n<p class=\"\"><\/p>\n\n\n\n<p class=\"is-style-st-paragraph-link\">Recommended Articles\uff1a<a href=\"https:\/\/bitcoin-zukan.com\/en\/learn\/what-is-bitcoin\/\" data-type=\"link\" data-id=\"https:\/\/bitcoin-zukan.com\/en\/learn\/what-is-bitcoin\/\" target=\"_blank\" rel=\"noreferrer noopener\">What is Bitcoin?<\/a><\/p>\n\n\n\n<div class=\"wp-block-st-blocks-my-box st-mybox\" style=\"background-color:#fff;border-color:#757575\"><div class=\"st-in-mybox\">\n<div class=\"wp-block-columns is-not-stacked-on-mobile is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img decoding=\"async\" width=\"600\" height=\"600\" src=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/10\/Twitter\u30a2\u30a4\u30b3\u30f3sizedown.png\" alt=\"Sigeru Minami\" class=\"wp-image-340\" style=\"aspect-ratio:1;width:100px;height:auto\" srcset=\"https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/10\/Twitter\u30a2\u30a4\u30b3\u30f3sizedown.png 600w, https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/10\/Twitter\u30a2\u30a4\u30b3\u30f3sizedown-300x300.png 300w, https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/10\/Twitter\u30a2\u30a4\u30b3\u30f3sizedown-150x150.png 150w, https:\/\/bitcoin-zukan.com\/wp-content\/uploads\/2023\/10\/Twitter\u30a2\u30a4\u30b3\u30f3sizedown-100x100.png 100w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.66%\">\n<p class=\"is-style-st-paragraph-marumozi\"><strong><strong>Writer\uff1aSigeru Minami<\/strong><\/strong><\/p>\n\n\n\n<p class=\"\">Creator of &#8220;Bitcoin-zukan.com.&#8221;<br>Active as a handmade craftsman of Bitcoin goods.<\/p>\n\n\n\n<p class=\"\"><br><\/p>\n<\/div>\n<\/div>\n\n\n\n<p class=\"\"><\/p>\n<\/div><\/div>\n\n\n\n<p class=\"\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Why do Bitcoin hacking incidents happen? Let&#8217;s explore the hacks that occurred at Japanese exchanges and what happened afterward!<\/p>\n","protected":false},"author":3,"featured_media":1509,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","_locale":"en_US","_original_post":"https:\/\/bitcoin-zukan.com\/?p=601","footnotes":""},"categories":[15],"tags":[],"class_list":["post-2785","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-learn-en","en-US"],"_links":{"self":[{"href":"https:\/\/bitcoin-zukan.com\/wp-json\/wp\/v2\/posts\/2785","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bitcoin-zukan.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bitcoin-zukan.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bitcoin-zukan.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/bitcoin-zukan.com\/wp-json\/wp\/v2\/comments?post=2785"}],"version-history":[{"count":0,"href":"https:\/\/bitcoin-zukan.com\/wp-json\/wp\/v2\/posts\/2785\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/bitcoin-zukan.com\/wp-json\/wp\/v2\/media\/1509"}],"wp:attachment":[{"href":"https:\/\/bitcoin-zukan.com\/wp-json\/wp\/v2\/media?parent=2785"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bitcoin-zukan.com\/wp-json\/wp\/v2\/categories?post=2785"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bitcoin-zukan.com\/wp-json\/wp\/v2\/tags?post=2785"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}