Password Authentication Protocol


Also found in: Acronyms, Wikipedia.

Password Authentication Protocol

(networking)
(PAP) An authentication scheme used by PPP servers to validate the identity of the originator of the connection.

PAP applies a two-way handshaking procedure. After the link is established the originator sends an id-password pair to the server. If authentication succeeds the server sends back an acknowledgement; otherwise it either terminates the connection or gives the originator another chance.

PAP is not a strong authentication method. Passwords are sent over the circuit "in the clear" and there is no protection against playback or repeated "trial and error" attacks. The originator is in total control of the frequency and timing of the attempts. Therefore, any server that can use a stronger authentication method, such as CHAP, will offer to negotiate that method prior to PAP. The use of PAP is appropriate, however, if a plaintext password must be available to simulate a login at a remote host.

PAP is defined in RFC 1334.
Mentioned in ?
References in periodicals archive ?
For initial dial-in security, the LRS32F supports the Password Authentication Protocol (PAP) and Challenge Handshake Authentication Protocol (CHAP).
To handle security, the WebVisa includes support for both the Password Authentication Protocol (PAP) and the Challenge Handshake Authentication Protocol (CHAP).
Supports Password Authentication Protocol (PAP) and Challenge Handshake Authentication Protocol (CHAP) authentication for remote access servers
WorldDesk Commuter and Comlink can serve as both Password Authentication Protocol (PAP) and Challenge Handshake Authentication Protocol (CHAP) security servers.
In addition, it provides password authentication protocol (PAP), challenge handshake authentication protocol (CHAP) and Farallon reliability.
This expands the LRS2's existing multi-level security features which include Password Authentication Protocol (PAP), Challenge Handshake Authentication Protocol (CHAP), user-defined passwords and a dial back feature.