| Summary: | 碩士 === 國立虎尾科技大學 === 資訊工程研究所 === 102 === The anonymous user authenticationschemes in wireless network have been proposed for about a decade, and the related security problems have also been issued by researchers. In 2004, Zhu and Ma proposed a user authentication scheme in wireless environments which mainly benefits from 4-way message exchange. Afterwards, many related works have been proposed for improving the security issue or enhancing the performance of the scheme. In our work, we focus on the authority of the foreign server, which refers to that we consider the network services are provided by a foreign server, hence the service provider should have the authority of authenticating the requester of network services instead of authenticating the requester via the registrar in which the requester has registered. According to this idea, we propose amobility network authentication scheme based on Chaotic maps in which the foreign server can authenticate the requester and the registrar simultaneously, and apply Chaotic maps in our scheme to assist in authenticating the mobile users and establishing the session key.
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