Tian-Fu Lee User authentication scheme with anonymity, unlinkability and untrackability for global mobility networks Security and Communication Networks 6
This investigation demonstrates that the scheme of Chang et al. cannot resist impersonation attacks and violates session key security. In addition, a secure and efficient authentication scheme based on the scheme of Chang et al. is proposed. The proposed scheme avoids the weaknesses of the authentication scheme of Chang et al. and ensures data unlinkability and users untrackability.
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