Zhengxian Gao

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Password authentication is the simplest and the most convenient authentication mechanism that allows a legal user to login the remote system. In 2004, Das et al proposed a dynamic ID-based remote user authentication scheme using smart cards. Later, Liao, Lee, and Hwang made a slight modification to achieve mutual authentication. In this paper, we point out(More)
In this paper, a design and establishment of certification authority is completed successfully, and the functions of digital certificate are extended through describing and encoding the role attribute extension of particular certificate using ASN.1. When issuing a certificate for user, it is appended to user's certificate that some access privilege coming(More)
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