Beware of QR code scanning authorization trap
Avoid scanning QR codes provided by others at will, especially QR codes that require "jump to third-party verification" during transactions. Such operations may induce you to authorize malicious smart contracts, resulting in the control of wallet permissions. It is recommended to manually check the transfer address and reject all unofficial links.
Strictly verify wallet and exchange sources
Only download wallets and exchange apps from official websites. Copycat software (such as counterfeit TokenPocket and IM wallets) may have built-in backdoors, which can steal private keys or generate fake USDT to trick users into transferring money. For cold wallets, hardware devices such as Ledger and Trezor are preferred.
Private keys/mnemonics are absolutely offline
Do not take screenshots, transmit online, or record on electronic devices. Write it down and store it in a physical safe or fireproof box. Refuse to reveal the mnemonic to anyone, including phishing calls disguised as "customer service".
Limiting the scope of smart contract authorization
Use tools such as Revoke.cash to regularly check wallet authorizations and cancel the permissions of idle DApps. Avoid opening "unlimited quota" contracts at one time, and give priority to single authorization mode to reduce the risk of assets being transferred in batches.
Enable multi-factor authentication
Bind the exchange account to Google Authenticator (2FA), and turn off low-security options such as SMS verification codes. For large withdrawals, enable the dual protection of "whitelist address + manual review" to prevent hackers from tampering with the target address.
Decentralized assets and small-amount testing
Store 90% of funds in cold wallets, leaving only a small amount of transaction funds in hot wallets or exchanges. When it comes to new platforms or cross-chain operations, first conduct a small test of 1-10U, and then perform large operations after confirming that the funds have arrived.
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