{"id":441403,"date":"2026-11-03T12:00:06","date_gmt":"2026-11-03T05:00:06","guid":{"rendered":"https:\/\/www.swingfish.trade\/blog\/market-news\/after-the-binance-hack-the-simple-security-rule-regulators-keep-coming-back-to-hot-vs-cold-wallets-441403\/"},"modified":"2026-11-03T12:00:06","modified_gmt":"2026-11-03T05:00:06","slug":"after-the-binance-hack-the-simple-security-rule-regulators-keep-coming-back-to-hot-vs-cold-wallets","status":"publish","type":"post","link":"https:\/\/www.swingfish.trade\/blog\/market-news\/after-the-binance-hack-the-simple-security-rule-regulators-keep-coming-back-to-hot-vs-cold-wallets-441403\/","title":{"rendered":"After the Binance hack, the simple security rule regulators keep coming back to, hot vs. cold wallets"},"content":{"rendered":"<div>\n<p>South Korea&#8217;s financial regulator wants local crypto exchanges to keep more customer assets in cold wallets, offline storage that hackers cannot reach over the internet. The push follows last week&#8217;s $6.3 billion theft from Binance, which came entirely from the exchange&#8217;s internet-connected hot wallets.\u00a0<\/p>\n<ul>\n<li><a href=\"https:\/\/investinglive.com\/education\/following-the-money-the-playbook-behind-the-6-3bn-binance-heist-and-a-suspected-106-million-theft\" target=\"_blank\" rel=\"follow\">Following the money: the playbook behind the $6.3bn Binance heist and a suspected $106 million theft<\/a><\/li>\n<\/ul>\n<p>The Financial Services Commission held an emergency meeting with major exchanges on 2 November. It reviewed how exchanges control access to their systems and approve withdrawals, and urged them to raise the share of assets held offline. It did not set a new legal ratio.<\/p>\n<p>The principle behind the request is simple: a hacker can only steal what is reachable online. Understanding the difference between hot and cold wallets explains why that matters, and why it is not a complete answer.<\/p>\n<p id=\"what-hot-and-cold-wallets-are\">What hot and cold wallets are<\/p>\n<p>A crypto wallet does not hold coins the way a purse holds cash. The coins live on the blockchain. What the wallet holds is the private key, a secret code that authorises spending. Whoever controls the key controls the coins.<\/p>\n<p>The difference between hot and cold is where that key sits.<\/p>\n<ul>\n<li>Hot wallet: the key is on a device or system connected to the internet. That makes it fast and convenient. An exchange can process thousands of withdrawals a day automatically, and an individual can trade or pay from a phone app in seconds.<\/li>\n<li>Cold wallet: the key is kept offline, on a hardware device, an air-gapped computer that never connects to a network, or even paper. Moving funds takes deliberate, often manual, steps.<\/li>\n<\/ul>\n<p>A useful comparison is a shop&#8217;s till versus its bank vault. The till holds enough cash to run the day. The vault holds the rest, and opening it takes time, people and procedures.<\/p>\n<p id=\"why-cold-storage-offers-more-protection\">Why cold storage offers more protection<\/p>\n<p>Most large crypto thefts are remote. An attacker breaks into a network, often through a single compromised laptop or account, then works their way towards the systems that sign transactions. If the key or the signing system is online, it can be reached that way. If it is offline, there is no network path to it. The attacker would need physical access, or would need to fool the people who operate it.<\/p>\n<p>Cold storage also slows things down, and slowness is a security feature. Moving funds out of cold storage typically requires several people, separate devices and a series of approvals. That gives time for something odd to be noticed. A hot wallet, by design, moves money in seconds, and so does a thief who controls it.<\/p>\n<p>The practical effect is to cap the damage. An exchange with 98% of customer assets in cold storage has only about 2% exposed online at any moment. A breach can still be serious, but it cannot empty the whole platform.<\/p>\n<p>The limits: cold storage is safer, not invulnerable. Keys can be lost, damaged or stolen physically, and staff can be tricked into approving a malicious transfer. And no exchange can run entirely cold, because it needs hot wallets to pay out customer withdrawals. Cold storage reduces how much is at risk. It does not remove the risk.<\/p>\n<p id=\"how-the-binance-hack-fits\">How the Binance hack fits<\/p>\n<p>Binance is a textbook case of both the strength and the limit of cold storage.<\/p>\n<p>On 29 October, an attacker moved about $6.36 billion out of Binance hot wallets across ten blockchains, most of it in roughly 20 minutes, according to blockchain analytics firm TRM Labs. TRM&#8217;s assessment is that the attacker gained control of the system Binance uses to sign hot wallet transactions, rather than stealing the keys themselves. Binance&#8217;s initial investigation reportedly pointed to a compromised laptop belonging to an engineer.<\/p>\n<p>Binance co-CEO Richard Teng has said the vast majority of user assets sit in cold wallets and only move to hot wallets when customers withdraw. In other words, the vault held. The till was emptied.<\/p>\n<p>The catch is scale. For an exchange of Binance&#8217;s size, even a small hot wallet share can amount to billions of dollars. Binance says users did not lose money, as it is covering the losses from company funds, but the episode shows that a hot wallet is only as safe as the systems and people that control it.<\/p>\n<p id=\"south-koreas-rules-and-how-its-exchanges-compare\">South Korea&#8217;s rules and how its exchanges compare<\/p>\n<p>South Korea is one of the few markets that puts a number on cold storage. Under its Virtual Asset User Protection Act, exchanges must keep at least 80% of customer crypto in cold wallets.<\/p>\n<p>Most of the big local platforms already go well beyond that. Cold wallet ratios at the end of September, based on Financial Supervisory Service data cited by local media:<\/p>\n<ul>\n<li>Upbit: 99.17%<\/li>\n<li>Bithumb: 94.76%<\/li>\n<li>Coinone: 85%<\/li>\n<li>Digital X (formerly Korbit): 82.79%<\/li>\n<li>GOPAX: 80.54%<\/li>\n<\/ul>\n<p>The spread matters. At 99%, about one coin in a hundred is exposed online. At 80%, it is one in five. That is why the FSC asked exchanges to raise their ratios rather than simply meet the minimum.<\/p>\n<p>The regulator also asked for tighter controls on withdrawal approvals and administrator access, continuous monitoring of deposits and withdrawals, more incident response staff, faster sharing of suspicious access attempts and additional reserves. That list is telling. It targets the approval and signing systems that, on TRM&#8217;s assessment, were the weak point at Binance. South Korea has its own history here: Upbit lost about $30 million in a hot wallet hack in November 2025 and later moved 99% of assets offline.<\/p>\n<p id=\"what-it-means-for-traders-and-investors\">What it means for traders and investors<\/p>\n<p>If you hold crypto on an exchange, you are relying on that exchange&#8217;s balance between hot and cold storage, and on its ability to cover losses if something goes wrong. Two questions are worth asking: how much of customer assets does it keep offline, and what reserves, insurance or company funds stand behind them? Some exchanges publish proof of reserves or cold storage figures; many do not.<\/p>\n<p>The same trade-off applies to individuals. Keeping crypto in an exchange account or phone app is the hot option: convenient for trading, but exposed to that platform&#8217;s security and your own device. A hardware wallet is the cold option: harder for a remote attacker to reach, but you become responsible for the key, and losing it can mean losing the coins for good.<\/p>\n<p>There is no single right answer. Many holders split the difference, keeping trading funds on an exchange and longer-term holdings offline. The point is to make that choice knowingly rather than by default.<\/p>\n<p id=\"what-to-watch-next\">What to watch next<\/p>\n<ul>\n<li>Whether South Korea turns the request into a rule. A higher legal minimum than 80%, or new requirements for signing systems and reserves, would mark a real policy shift. For now it is guidance.<\/li>\n<li>Binance&#8217;s root cause report. The exchange has not yet published a full account of how its signing systems were compromised. That will show whether the lesson is about cold storage ratios, or about how hot wallets are controlled.<\/li>\n<li>Other regulators. If authorities elsewhere follow with cold storage or disclosure requirements, exchanges may need to publish their ratios, giving users a clearer way to compare platforms.<\/li>\n<li>Customer behaviour. Binance saw billions in net outflows when withdrawals reopened. A sustained shift of coins off exchanges and into self-custody would show users are acting on the risk.<\/li>\n<\/ul>\n<p>What could change the picture: if the Binance investigation finds the breach would have reached cold systems too, the debate moves from how much is stored offline to how approvals are protected. Either way, the useful question for readers is the same: how much of my crypto is reachable online, and who stands behind it if it goes?\u00a0<\/p>\n<\/p>\n<p>                            This article was written by Eamonn Sheridan at investinglive.com.<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>South Korea&#8217;s financial regulator wants local crypto exchanges to keep more customer assets in cold wallets, offline storage that hackers cannot reach over the internet. The push follows last week&#8217;s $6.3 billion&hellip;<\/p>\n","protected":false},"author":216,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86],"tags":[],"class_list":["post-441403","post","type-post","status-publish","format-standard","hentry","category-market-news"],"_links":{"self":[{"href":"https:\/\/www.swingfish.trade\/blog\/wp-json\/wp\/v2\/posts\/441403","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.swingfish.trade\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.swingfish.trade\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.swingfish.trade\/blog\/wp-json\/wp\/v2\/users\/216"}],"replies":[{"embeddable":true,"href":"https:\/\/www.swingfish.trade\/blog\/wp-json\/wp\/v2\/comments?post=441403"}],"version-history":[{"count":0,"href":"https:\/\/www.swingfish.trade\/blog\/wp-json\/wp\/v2\/posts\/441403\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.swingfish.trade\/blog\/wp-json\/wp\/v2\/media?parent=441403"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.swingfish.trade\/blog\/wp-json\/wp\/v2\/categories?post=441403"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.swingfish.trade\/blog\/wp-json\/wp\/v2\/tags?post=441403"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}