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2. Passwordless authentication - Wikipedia

   en.wikipedia.org/wiki/Passwordless_authentication

   Passwordless authentication is sometimes confused with multi-factor authentication (MFA), since both use a wide variety of authentication factors, but while MFA is often used as an added layer of security on top of password-based authentication, passwordless authentication does not require a memorized secret and usually uses just one highly ...

3. Digital identity - Wikipedia

   en.wikipedia.org/wiki/Digital_identity

   It is important to note that two-factor authentication will typically be required every time when attempting a login to an account [19] Certificate-Based Authentication: This form of authentication prioritizes the use of digital certificates, typically an individual's driver's license or a passport as a form of an electronic document.

4. Password - Wikipedia

   en.wikipedia.org/wiki/Password

   The easier a password is for the owner to remember generally means it will be easier for an attacker to guess. [12] However, passwords that are difficult to remember may also reduce the security of a system because (a) users might need to write down or electronically store the password, (b) users will need frequent password resets and (c) users are more likely to re-use the same password ...

5. HMAC - Wikipedia

   en.wikipedia.org/wiki/HMAC

   HMAC uses two passes of hash computation. Before either pass, the secret key is used to derive two keys – inner and outer. Next, the first pass of the hash algorithm produces an internal hash derived from the message and the inner key. The second pass produces the final HMAC code derived from the inner hash result and the outer key.

6. Authenticator - Wikipedia

   en.wikipedia.org/wiki/Authenticator

   First and foremost, strong authentication begins with multi-factor authentication. The best thing one can do to protect a personal online account is to enable multi-factor authentication. [13] [21] There are two ways to achieve multi-factor authentication: Use a multi-factor authenticator; Use a combination of two or more single-factor ...

7. FIDO Alliance - Wikipedia

   en.wikipedia.org/wiki/FIDO_Alliance

   FIDO2 is based upon previous work done by the FIDO Alliance, in particular the Universal 2nd Factor (U2F) authentication standard. Taken together, WebAuthn and CTAP specify a standard authentication protocol [ 7 ] where the protocol endpoints consist of a user-controlled cryptographic authenticator (such as a smartphone or a hardware security ...