TY - JOUR T1 - Cryptanalysis on Anonymous Two Factor Mutual Authentication with Key Agreement Scheme For Session Initiation Protocol AU - Choi, Younsung JO - Research Journal of Applied Sciences VL - 12 IS - 5 SP - 352 EP - 357 PY - 2017 DA - 2001/08/19 SN - 1815-932x DO - rjasci.2017.352.357 UR - https://makhillpublications.co/view-article.php?doi=rjasci.2017.352.357 KW - Cryptanalysis KW -session initiation KW -protocol KW -security analysis KW -authentication KW -scheme AB - In order to solve the limitations of the password-based authentication scheme, various two-factor authentication schemes for session initiation protocol is studied and regards it as good solution. In 2015, Lu proposed secure two-factor authenticated key agreement which provide the anonymity and key agreement for session initiation protocol using elliptic curve cryptography. However, Reddy point out the vulnerability the Lu scheme and proposed an enhanced anonymous two-factor mutual authentication with key-agreement scheme for session initiation protocol in 2016 but there are various security problem yet. So, this study analyzes all phases of Reddy authentication scheme and then shows that their scheme is still vulnerable on off-line password (and identity) guessing attack a DoS attack, wrong password change phase and session key disclosure attack. ER -