Why password alone isn't enough
Passwords leak through data breaches, phishing pages, and reused logins across sites. Two-factor authentication (2FA) requires a second proof — something you have, not just something you know — before access is granted.
SMS 2FA: better than nothing, but weakest
Text-message codes can be intercepted through SIM-swapping, where a scammer convinces your carrier to port your number to their device. It still blocks casual attackers, but skip it for exchange accounts holding real value if a stronger option exists.
- SIM-swap attacks specifically target crypto holders because phone numbers are often the weak link.CAUTION
Authenticator apps: the practical standard
Apps like Google Authenticator, Authy, or 1Password generate a rotating code on your device, with no signal that can be intercepted over the air. Set this up on every exchange and email account tied to crypto.
Hardware security keys: the strongest option
A physical key (like a YubiKey) that you tap or insert is virtually immune to remote phishing, because the key checks that it's talking to the real site before responding. Recommended for high-value accounts.
Don't forget backup codes
When you enable 2FA, you'll be given one-time backup codes. Save them somewhere offline and secure — losing your 2FA device without backup codes can lock you out of your own account.
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