| Summary: | 碩士 === 國立臺中科技大學 === 資訊工程系碩士班 === 101 === In recent years, the development of information and network technology are very well, it is easy to access resources from the server end over the network for any users. However, lots of users frequently get they wanted information from network, it is resulting in many security problem will be happened, the verification of identity is a very important issue. In previous, researcher proposed smart card-based authentication of identity schemes to solve those problems. With the widespread promotion in e-commerce, the number of service servers providing internet applications to the users is usually more than one and hence secure authentication protocols for multi-server environment are required.
In this thesis, we will propose two authentication schemes in multi-server environment to remedy the weakness of previously proposed schemes. Compared with the previously proposed schemes, our protocols are more suitable for the user authentication for multi-server environment.
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