Analysis and Improvement of 'Chaotic Map Based Mobile Dynamic ID Authenticated Key Agreement Scheme'

In distributed networks, anonymous user authentication is crucial to enable authorized access and guard privacy. Recently, Lin proposed a chaotic map-based anonymous mobile user authentication scheme. In this paper, we analyze the security of Lin's scheme and identify that the scheme is vulnerable to impersonation attack and server masquerading attack. We then devise an improved chaotic map-based authentication scheme to assure reliability and security. Compared with the related chaotic map-based authentication schemes, our protocol employs an innovative solution which rectifies the security flaws caused by the inherent defect of Chebyshev chaotic map-based public key systems. Furthermore, BAN-logic is put forward to certify the validity of our proposal. The security and performance analysis also shows that our scheme provides stronger security and better scalability than previous related schemes.