Overview#

Google Authenticator is an Authenticator that provides a soft token that implements two-step verification services using the Time-based One-time Password Algorithm (TOTP) and HMAC-based One-Time Password Algorithm (HOTP), for authenticating users of mobile Device applications by Google.

The service implements algorithms specified in RFC 6238 and RFC 4226.

Authenticator provides a six- to eight-digit one-time password which users MUST provide in addition to their username and password to log into Google services or other websites.

Previous versions of the Google Authenticator were open-sourced but subsequent releases are proprietary.

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« This page (revision-1) was last changed on 03-Jul-2017 08:35 by jim