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YoungHo PARK Hwangjun SONG KyungKeun LEE CheolSoo KIM SangGon LEE SangJae MOON
A secure and efficient route discovery protocol is proposed for ad hoc networks, where only one-way hash functions are used to authenticate nodes in the ROUTE REQUEST, while additional public-key cryptography is used to guard against active attackers disguising a node in the ROUTE REPLY.
KyungKeun LEE YoungHo PARK SangJae MOON
Recently, Yoon et al. exhibited the vulnerability of the smart-card-equipped password based authentication protocol proposed by Chien et al. to the Denning-Sacco attack. Furthermore, they also pointed out that the protocol does not provide the perfect forward secrecy. Accordingly, they presented an enhanced protocol to strengthen the security. This letter, however, demonstrates an interleaving attack on the Yoon et al.'s improved protocol and also discusses how to defend the protocol from the attack presented here.