A secure electronic voting scheme based on anonymous communication channel is proposed by using group signature protocol and timed commitment protocol.The identity information of honest voters can be protected unconditionally while dishonest voters are sure to be traced by the trusted registration agent.We can also prove:Even the administrator and the counting agent conspire

the voting privacy and fairness can be realized simultaneously before the counting.Besides

we also solved the problems such as "vote collision"

"voter abstains from voting or quits midway" et al.