Efficient GSM Authentication and Key Agreement Protocols with Robust User Privacy Protection

Abstract

Nowadays, GSM is used widely by people around the world. However, there are also some problems of GSM authentication to be found. In 2004, Choi et al. proposed an authentication scheme with user privacy protection in GSM. They claimed that their scheme can improve some drawbacks of GSM authentication and achieve an ability of user privacy protection. But we point out that Choi et al.’s scheme is not able to achieve privacy and is not able to resist some well-known attacks completely. Hence, we propose a more efficient GSM authentication protocol with robust identity privacy protection. Our scheme also can remedy all drawbacks of GSM authentication mentioned by Choi et al. and resist to well-known attacks.