Too Long; Didn't Read
KuCoin, OKEx, Huobi and Bybit all suffered major security breaches in recent weeks. KuCoin was hacked in September, and the total value of hacked funds was estimated to be around $280 million. OKEx halted all withdrawals from the exchange after one of its private key holders is cooperating with a public security bureau investigation. Huobi said it operated a multi-signature security system over its wallets, providing some reassurance to worried users. Multisignature wallets, which require more than one signature for any transaction, are one security measure.