Validating identity cisco

24-Aug-2016 08:24

That entity may be, for example, an Internet service provider. CHAP provides protection against replay attacks by the peer through the use of an incrementally changing identifier and of a variable challenge-value.CHAP requires that both the client and server know the plaintext of the secret, although it is never sent over the network.The ID chosen for the random challenge is also used in the corresponding response, success, and failure packets.A new challenge with a new ID must be different from the last challenge with another ID.

CHAP is an authentication scheme used by Point to Point Protocol (PPP) servers to validate the identity of remote clients.CHAP periodically verifies the identity of the client by using a three-way handshake.