An Improved Two-party Password-Authenticated Key Agreement Protocol with PrivacyPassword-Authenticated Key Agreement Protocol • March 26th, 2017
Since the 1990s, chaotic systems have widely used to cryp- tography which can be used to design kinds of secure protocols, digital signatures, hash functions and so on. Recently, Guo and Zhang proposed an chaotic public-key cryptosystem based key agreement protocol. In 2015, Lee has proved that Guo et al.’s scheme cannot resist off-line password guess attack. Then, Liu and Xue further point out that Guo et al.’s scheme has redundancy in protocol design and still has some security flaws. In this paper, we further prove that Liu’s scheme has four flaws at least and a potential loophole. Moreover, these papers pro- vided no privacy protection which is a very important property in the modern social network. So an improved Two-party Password-Authenticated Key Agreement Pro- tocol with Privacy Protection is proposed for amending these flaws and loophole. Compared with the related lit- eratures recently, our proposed scheme can not only own high efficiency and unique functionality, but is als
