Google Authenticator Shirt
A classic
cotton tee emblazoned with the Wikipedia article on Google Authenticator ↗.- Preshrunk jersey knit
- Seamless double-needle 2.2 cm collar
- Taped neck and shoulders
- Tear away label
- Double-needle sleeve and bottom hems
- Quarter-turned to eliminate centre crease
Google Authenticator is a software-based authenticator by Google. It implements multi-factor authentication services using the time-based one-time password (TOTP; specified in RFC 6238) and HMAC-based one-time password (HOTP; specified in RFC 4226), for authenticating users of software applications.
When logging into a site supporting Authenticator (including Google services) or using Authenticator-supporting third-party applications such as password managers or file hosting services, Authenticator generates a six- to eight-digit one-time password which users must enter in addition to their usual login details.
Google provides Android, Wear OS, BlackBerry, and iOS versions of Authenticator.
An official open source fork of the Android app is available on GitHub. However, this fork was archived in Apr 6, 2021 and is now read only.
Current software releases are proprietary freeware.
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