TOTP.fyi – debugging tool for app-based 2FA

Show HN: TOTP.fyi – debugging tool for app-based 2FA

TOTP.fyi – debugging tool for app-based 2FA is active in the show hn launch space.

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This is a tool to debug "app-based 2FA", which almost certainly uses the time-based one-time password (TOTP) algorithm these days. This is the type of 2FA that shows the QR code for your phone to scan, commonly involving apps like Google Authenticator or Authy. The QR code contains a base32-encoded secret and some information about the website and if some other setting is used instead of the default.The way the algorithm works is by dividing the current Unix time by the time step (commonly 30 seconds), and generating an HMAC from that. That's why most codes expire twice every minute at :00 and :30. However, to avoid clock synchronization issues, most websites will allow the codes from one or

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Website: totp.fyi