A Secure and Efficient Two-Server Password Only Authenticated Key Exchange
Journal Title: IOSR Journals (IOSR Journal of Computer Engineering) - Year 2014, Vol 16, Issue 2
Abstract
Abstract: Password-authenticated key exchange (PAKE) is an authentication mechanism where a client and a server who share a password and authenticate each other with that password and hence both will agree on a cryptographic key. Normally, the passwords which are required to verify the clients are stored on a single server. If the server is compromised, due to some malicious operations like hacking or installing a Trojan horse, passwords which are stored in the server gets revealed. In this paper two servers cooperate to authenticate a client and if one server is cooperated, the attacker still cannot act as a client with the evidence from the conceded server. Current solutions for two servers PAKE are either symmetric in the way that the two server correspondingly contribute to the authentication or asymmetric in the sense that one server confirms the authenticity of legal client with the assistance of another server. This paper presents the development of symmetric protocol for two-server PAKE, where the client can establish different cryptographic keys with the two servers. In addition to that a nonce will be generated during the period of authentication and this will act as a timer. If the timer does not expire with in the period limit, the authentication procedure will be carried out within the limit which provides security to replay attacks.
Authors and Affiliations
Ms. Sandra Bhavadas A. B , Ms. Jini K. M
Keywords
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