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This paper proposes a new three-factor authenticated key agreement scheme for SIP on elliptic curve cryptosystem (ECC). In the proposed scheme, we adopts three-factor (password, token, and biometrics) authentication technique to provide strong authentication. In order to provide secure and efficient key agreement between the user client and the SIP server, the proposed scheme adopts ECC to offer a...
In SAC'05, Strangio proposed protocol ECKE-1 as an efficient elliptic curve Diffie-Hellman two-party key agreement protocol using public key authentication. However, Wang et al. showed that the ECKE-1 protocol is vulnerable to key-compromise impersonation attacks. They also presented an improved protocol ECKE-1N, which can withstand such attacks. This paper proposes a more efficient elliptic curve...
In 2008, Tsai proposed an efficient nonce-based authentication scheme for Session Initiation Protocol (SIP). The current paper, however,demonstrates that Tsai's authentication scheme is still vulnerable to off-line password guessing attacks, Denning-Sacco attack and stolen-verifier attacks, and does not provide perfect forward secrecy. We also propose a new secure and efficient authentication scheme...
In 2008, Wu et al. proposed a new authentication and key exchange (NAKE) protocol based on elliptic curve cryptography for session initiation protocol, which provides provable security in CK security model. This paper, however, demonstrates that Wu et al.'s NAKE protocol is vulnerable to off-line password guessing attacks and then presents an improved protocol in order to isolate such a problem.
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