3 ms·
2FA is usually time limited? So this seems not to be an issue?
by pintxo 3y ago
2FA is usually time limited? So this seems not to be an issue?
- rhysmdnz 3y agoBecause of fun probability stuff. The fact what your guessing changes doesn’t matter. It’s still a day to get a correct guess. https://pulsesecurity.co.nz/articles/totp-bruting https://pulsesecurity.co.nz/articles/totp-bruting
- 8organicbits 3y agoThink about a time-based one-time passcode (OTP). Every 30 seconds you get a fresh code and the attacker tries to guess that code. There's usually a validity window of one or more OTP, so the attacker needs to guess one of several possible currently valid OTP. This is a popular trick in CTF exercises and it's pretty quick if you can make 1000 guesses per second. Takes a couple minutes until you're in.