Read more: How to Check Other Email Accounts Through Yahoo Mail? How to Recover Google authenticator codes? The user runs the Authenticator app, which then independently computes and displays the same password, which the users have typed in, authenticating their identity. Now to log into a website or service which uses two-factor authentication and supports Authenticator, the user gives username and password to the website, which then computes (but it does not display) the required six-digit one-time password and it asks the user to enter it. This secret key will be used for all of the future logins to that website. It has to be set up for each site with which it is to be used, the site offers a shared secret key to the user over a secure channel, to be stored in the Authenticator app. To use the Authenticator, the app is first installed on a smartphone. The previous versions of the software were open source but from 2013 the releases are proprietary. The Authenticator generates a six to eight-digit one-time password which the users have to enter in addition to their usual login details. When you are logging into a website which is supporting Authenticator (containing Google services) or by using Authenticator supporting third party applications such as password managers or file hosting services. Google Authenticator is a software-based authenticator developed by Google which implies two-step verification services by using the Time-based One-time Password Algorithm (TOTP, specified in RFC 6238) and HMAC based One-time Password Algorithm (HOTP, specified in RFC 4226) for the authentication of the users of software applications.
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