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Research of authentication mechanism in CHAP

By: Lin Hong-gang;

2011 / IEEE / 978-1-4244-8039-5


This item was taken from the IEEE Conference ' Research of authentication mechanism in CHAP ' The method of double-factor authentication is usually embedded in CHAP (Challenge Handshake Authentication Protocol) to enhance the security of the authentication service. The CHAP protocol with double-factor authentication is formally verified from the intruder's aspect, and some data structures is abstracted from the protocol to build up the framework of reasoning-logic. By the means of adverse deduction, the framework of reasoning-logic is analyzed thoroughly, the flaws of the CHAP protocol is found and the corresponding attacking scenario is given. The result shows that the CHAP protocol with double-factor authentication has some security holes and can't achieve the security requirement of the design.