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In this paper, we propose a mutual authentication and key agreement scheme for V2I communications. Our scheme improves security and privacy protection compared with the existing protocols. We consider common driver's tendency to design a more efficient scheme. The results of the security and performance analysis show that our scheme is suitable for practical use in terms of security, privacy, and...
A conditional access system (CAS) proposed by Sun has a critical security weakness in its inability to preserve backward secrecy; a former subscriber can still access programs despite his or her change in status. This weakness in Sun 's CAS originates because 1) no change is made to a group key after a new member arrives, and 2) updates of group keys are done in an insecure manner. We show how simple...
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