Challenge-Handshake Authentication Protocol: Difference between revisions

Revision as of 20:53, 2 October 2016

Revision as of 08:54, 10 October 2016

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==Working cycle==

CHAP is an authentication scheme used by [[Point to Point Protocol|Point to Point Protocol (PPP)]] servers to validate the identity of remote clients. CHAP periodically verifies the identity of the [[client (computing)|client]] by using a [[Handshaking|three-way handshake]]. This happens at the time of establishing the initial [[Link Control Protocol|link (LCP)]], and may happen again at any time afterwards. The verification is based on a [[shared secret]] (such as the client user's password).<ref name="Forouzan2007">{{cite book|author=Forouzan|title=Data Commn & Networking 4E Sie|url=httphttps://books.google.com/books?id=6HaNKmfBK1oC&pg=PA352|accessdate=24 November 2012|year=2007|publisher=McGraw-Hill Education (India) Pvt Limited|isbn=978-0-07-063414-5|pages=352–}}</ref>

# After the completion of the link establishment phase, the authenticator sends a "challenge" message to the peer.