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RADIUS is a client/server protocol that runs in the application layer, and can use either TCP or UDP. Network access servers, which control access to a network, usually contain a RADIUS client component that communicates with the RADIUS server. [1] RADIUS is often the back-end of choice for 802.1X authentication. [2]
The Central Authentication Service (CAS) is a single sign-on protocol for the web. [1] Its purpose is to permit a user to access multiple applications while providing their credentials (such as user ID and password) only once.
An illustration of password-based authentication using simple authentication protocol: Alice (an entity wishing to be verified) and Bob (an entity verifying Alice's identity) are both aware of the protocol they agreed on using. Bob has Alice's password stored in a database for comparison.
The NTLM protocol uses one or both of two hashed password values, both of which are also stored on the server (or domain controller), and which through a lack of salting are password equivalent, meaning that if you grab the hash value from the server, you can authenticate without knowing the actual password.
an NT LAN Manager authentication mechanism GS2-family of mechanisms supports arbitrary GSS-API mechanisms in SASL. [3] It is now standardized as RFC 5801. GSSAPI for Kerberos V5 authentication via the GSSAPI. GSSAPI offers a data-security layer. BROWSERID-AES128 for Mozilla Persona authentication [4] EAP-AES128 for GSS EAP authentication [5]
Conversely, single sign-off or single log-out (SLO) is the property whereby a single action of signing out terminates access to multiple software systems. As different applications and resources support different authentication mechanisms, single sign-on must internally store the credentials used for initial authentication and translate them to ...
This method should throw a javax.security.auth.login.FailedLoginException if authentication fails (e.g. a user has specified an incorrect login or password). abort: Called if the authentication process itself fails. If this method returns false, then this Login Module is ignored.
A user enters a username and password on the client machine(s). Other credential mechanisms like pkinit (RFC 4556) allow for the use of public keys in place of a password. The client transforms the password into the key of a symmetric cipher. This either uses the built-in key scheduling, or a one-way hash, depending on the cipher-suite used.