摘要： 针对无需中央机构的电子投票协议——Su-协议，分析指出投票者在给出其解密选票结果的参数时，协议无法确保投票人给出的参数是正确的，攻击者可以在投票的第5步给出经过设计的参数从而可以左右系统的计票结果。据此给出针对Su-协议的3种可行的攻击：公平性攻击，选票篡改攻击和秘密性攻击。

关键词: 电子投票, 公平性, 秘密性, 准确性

Abstract: Focusing on an electronic voting protocol without authority based on ElGamal encryption scheme. This paper points out that this protocol camnot guarantee the validity of the parameters sent out by voter for voting account. So the attacker has chance to change the voting result if he sends out a designed parameter at the fifth step. Three attack proposals towards Su-protocol are given, including fairness attack, accuracy attack and privacy attack.

Key words: electronic voting, fairness, privacy, accuracy

中图分类号: 

• TP309.2