Cryptanalysis of SIP secure and efficient authentication scheme
Mohit Kumar Gokhroo, C. D. Jaidhar, Anurag Singh Tomar · 2011
Recently SIP authentication scheme using Elliptic Curve Cryptography has been proposed and it was claimed that scheme is efficient and secure against replay attack, password guessing attack, Man-in-middle Attack, Modification attack, Denning-Sacco attacks and Stolen verifier attack. In addition, it provides mutual authentication between communicating parties and generates a session key agreed between them. This paper shows that the scheme is still insecure. An adversary can easily derive the session key from the intercepted messages.