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Design of the Secure E-voting System Including Absentee Voters Which Enables Ballot-Cancellation Based on Double Encryption

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概要 Many electronic voting schemes have been proposed without considering an absentee voting. In this paper, we propose the secure e-voting scheme including an absentee voter based on double encryption, w...hich can cancel the ballot in voting results, called ballot-cancellation. The double encryption scheme for e-voting system was proposed in [Hersch97][TYKK98]. The double encryption of [Hersch97] was only for strengthen encryption of the vote. On the other hand, Tsujii et at. proposed two double encryptions based on two independent authorities in [TYKK98]. The voting content is encrypted by two public keys of two independent authorities. Two authorities enable the mutual checking on each authority. In this paper, we modify double encryption of [TYKK98] and introduce the ballot-cancellation scheme based on r-th residue encryption. Also, for a voter’s authentication, we use the blind signature based on [FOO92]. [FOO92] scheme was known as one of the standard schemes in e-voting. EVOX[Du99] and Sensus[CC96] had been implemented by [FOO92]. The disadvantage of this scheme is walk away. That is, after a voter cast the voting, a voter should send bit-commitment again for checking in counting stage. To prevent this disadvantage, we use the blind signature and double encryption by two mutual independent authorities (administrator and tallier) without using bit-commitment. In our scheme, we do not use a voter’s key. So, after a voter casts the voting, a voter knows only signature value on own vote. This scheme can prevent an effluence of the voting content by a voter’s key.続きを見る

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登録日 2009.04.22
更新日 2017.03.02