Binance’s $6.3B hack leaves questions over hot wallet safeguards
Binance’s $6.3 billion security incident exposed unanswered questions about controls on its hot wallets and signing system. The exchange said attackers accessed an internal wallet-signing service and moved funds outside normal withdrawal procedures; most customer assets were in cold storage. Analysts said blockchain records reveal transfers but cannot show internal authorization rules or determine how much attackers could access over time. Security experts noted that exchanges commonly keep a small share of assets in hot wallets, while independent signing limits, address controls and manual approvals can help cap losses. Binance has not disclosed details of its wallet balances or safeguards, and experts said outsiders cannot reliably compare its internal systems with those of other exchanges.
