| Summary: | 碩士 === 南華大學 === 資訊管理學研究所 === 95 === Recently, the bilinear pairings cryptosystem over ellipse curve is widely used on varieties of schemes such as electronic voting system, electronic cash system, digital signature scheme, smart card system, key agreement protocol and authentication protocol etc. The security of bilinear pairings cryptosystem is equal to the cryptosystem based on discrete log problem, but it is more efficient than the latter. Hence, the bilinear pairings cryptosystem is a practical cryptosystem.
In this paper, we analyze several current electronic voting protocols and deniable authentication protocols. Then we design an electronic voting protocol and propose a deniable authentication protocol both based on bilinear pairings. The new electronic voting protocol can satisfy the security requirements of an e-voting system and the proposed deniable authentication protocol can not only attain the desired deniable property but also can prevent all known attacks.
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