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In cryptography, a message authentication code (MAC), sometimes known as an authentication tag, is a short piece of information used for authenticating and integrity-checking a message. In other words, to confirm that the message came from the stated sender (its authenticity) and has not been changed (its integrity).
The RSA SecurID authentication mechanism consists of a "token"—either hardware (e.g. a key fob) or software (a soft token)—which is assigned to a computer user and which creates an authentication code at fixed intervals (usually 60 seconds) using a built-in clock and the card's factory-encoded almost random key (known as the "seed").
Authenticator apps provide secure verification codes that act as the second step in 2-step verification. After entering your password, you'll need to enter the code generated by your...
In cryptography, an HMAC (sometimes expanded as either keyed-hash message authentication code or hash-based message authentication code) is a specific type of message authentication code (MAC) involving a cryptographic hash function and a secret cryptographic key.
An app password is a randomly generated code that gives a non-AOL app permission to access your AOL account. You'll only need to provide this code once to sign in to your 3rd party email app. App passwords remain active - even if you change your main account password.
Time-based one-time password ( TOTP) is a computer algorithm that generates a one-time password (OTP) using the current time as a source of uniqueness. As an extension of the HMAC-based one-time password algorithm (HOTP), it has been adopted as Internet Engineering Task Force (IETF) standard RFC 6238. [1]
Having trouble signing in? Find out how to identify and correct common sign-in issues like problems with your username and password, account locks, looping logins, and other account access errors.
A third-party authenticator app enables two-factor authentication in a different way, usually by showing a randomly generated and constantly refreshing code which the user can use, rather than sending an SMS or using another method.
The authentication server encrypts a challenge (typically a random number, or at least data with some random parts) with a public key; the device proves it possesses a copy of the matching private key by providing the decrypted challenge.
HTTP digest authentication is designed to be more secure than traditional digest authentication schemes, for example "significantly stronger than (e.g.) CRAM-MD5..." (RFC 2617). Some of the security strengths of HTTP digest authentication are: The password is not sent clear to the server.