How to use the YubiKey with Gmail 2 step verification

This video shows a demonstration of how to use a YubiKey to generate a TOTP for Gmail. Please read more here: yubico.com/​totp

Gmail supports 2 step verification using OATH in TOTP (Time based One Time Password) mode. The YubiKey supports OATH, but not in TOTP (the YubiKey supports HOTP - or counter based HMAC One Time Passwords).

However, using the challenge response mode of the YubiKey, a HMAC-SHA1 hash is created from the input - which is the basis for OATH. So with a correctly configured YubiKey and a helper app, a valid TOTP can be generated.

Category:

Science & Technology

Tags:

• How-to
• yubico
• yubikey
• gmail
• google
• 2 step verification
• two factor authentication