[SlowMist Cosine: Smart Contract Owners Should Use Multi-Signature and Hardware Wallets to Strengthen Key Management] According to a report by Jinse Finance, SlowMist Cosine posted on Platform X stating, 'The Owner of a project's smart contract must use multi-signature. Those holding the keys must only use hardware wallets that support complex signature parsing and have large screens... From mnemonic generation to usage, everything should be done within the hardware wallet. Add a passphrase or use SSS (Shamir's Secret Sharing) for backup to make it more secure... Also, stay calm during regular use, avoid signing recklessly, and conduct disaster recovery drills. Accidental drills will inevitably lead to unexpected issues.'