兩步驗證(2FA)
快速回答
兩步驗證(2FA)在密碼之外加一道驗證,擋住大多數帳戶被盜。用驗證器 App 或硬體安全金鑰,而非可被 SIM 劫持的簡訊。並在交易所支援時開啟提現地址白名單與反釣魚碼。
A password alone is a single point of failure — leaks and phishing make passwords unreliable on their own. Two-factor authentication requires a second proof of identity at login, so even a stolen password isn't enough to get in. Turning it on is the highest-impact security step for any exchange account.
Not all 2FA is equal. SMS codes are better than nothing but vulnerable to SIM-swap attacks, where an attacker ports your phone number to their device. An authenticator app (TOTP) is much stronger, and a hardware security key is stronger still, resisting phishing because it verifies the real site before responding.
Beyond 2FA, exchanges offer extra hardening worth enabling: a withdrawal address whitelist (so funds can only leave to pre-approved addresses), an anti-phishing code (so you can spot fake emails), and login and withdrawal alerts. Each closes a door that attackers commonly use.
Protect the 2FA itself. Save your authenticator backup codes offline when you set it up, so you aren't locked out if you lose your phone, and never enter a 2FA code on a site you reached from a link. Combined with a unique password and self-custody for large holdings, strong 2FA makes account takeover very hard.
常見問題
Is SMS 2FA safe enough?
It's better than no 2FA, but weaker than the alternatives because of SIM-swap attacks. An authenticator app or a hardware security key is significantly safer and recommended for any account holding meaningful value.
What if I lose the phone with my authenticator app?
If you saved your backup codes when enabling 2FA, you can recover access. Without them you may need the exchange's account-recovery process. Always store backup codes offline when you turn on 2FA.
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