A Dynamic ID-Based Generic Framework for Anonymous Authentication Scheme for Roaming Service in Global Mobility Networks

User authentication scheme is an essential issue for offering roaming service to mobile users in global mobile network (GLOMONET). However, designing an anonymous user authentication scheme in GLOMONET is a challenging task since wireless communication networks are susceptible to a variety of attacks and mobile devices are of limited storage, processing and communication capabilities. Recently, Miyoung and Rhee examined the schemes proposed by Wei et al. and Wu et al., and came up with an improved authentication scheme offering user anonymity in GLOMONET. We point out that Miyoung and Rhee scheme is exposed to off-line password guessing and user impersonation attacks. Also, their scheme cannot offer user anonymity, password change or updating option and quick detection of wrong password. In order to overcome the flaws present in Miyoung and Rhee scheme, we propose a dynamic ID-based generic framework for anonymous authentication scheme for roaming service in GLOMONET, which is invincible to various prying attacks of intruders. Furthermore, the performance analysis proves that our scheme is versatile, simple and secure when compared to the existing authentication schemes.