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Authentication can provide security by preventing unauthorized usage and negotiating the credentials for secure communication. Nevertheless, it induces heavy overhead to communications, further deteriorating the Quality of Service (QoS). Analyzing QoS and security impact of authentication, therefore, becomes critical to developing efficient authentication schemes. In this paper, the authors propose a system model for the analysis of challenge/response authentication in wireless networks. In the proposed double token based fast authentication scheme, one token is generated in the registration phase and second in the authentication phase which provides another layer of security to the authentication scheme.
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