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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.
To establish TOTP authentication, the authenticatee and authenticator must pre-establish both the HOTP parameters and the following TOTP parameters: T 0, the Unix time from which to start counting time steps (default is 0), T X, an interval which will be used to calculate the value of the counter C T (default is 30 seconds).
Free and open source app for Android to manage your 2-step verification tokens. [ 1] Open Source Cross platform password manager. 2FA is a premium feature. [ 2] Free and open source app for Android and iOS to manage your 2-step verification tokens. [ 4] Cross-platform 2FA Authenticator with TOTP & HOTP generator with sharing capabilities and ...
4. Select Authenticator app for your 2-step verification method.-To see this option, you'll need to have at least 2 recovery methods on your account . 5. Click Continue. 6. Scan the QR code using your authenticator app. 7. Click Continue. 8. Enter the code shown in your authenticator app. 9. Click Done. Sign in with 2-step for authenticator app. 1.
HMAC-based one-time password ( HOTP) is a one-time password (OTP) algorithm based on HMAC. It is a cornerstone of the Initiative for Open Authentication (OATH). HOTP was published as an informational IETF RFC 4226 in December 2005, documenting the algorithm along with a Java implementation. Since then, the algorithm has been adopted by many ...
Two-Factor Authentication. Quite simply, Two-Factor Authentication requires two forms of user authentication rather than a single form to allow you to access a digital system. By requiring two ...
A one-time password ( OTP ), also known as a one-time PIN, one-time passcode, one-time authorization code ( OTAC) or dynamic password, is a password that is valid for only one login session or transaction, on a computer system or other digital device. OTPs avoid several shortcomings that are associated with traditional (static) password-based ...
e. Digest access authentication is one of the agreed-upon methods a web server can use to negotiate credentials, such as username or password, with a user's web browser. This can be used to confirm the identity of a user before sending sensitive information, such as online banking transaction history.