The scheme has the property of verification and can prevent inside member conspiracy attack.
该方案具有可验证性和防止内部成员合谋攻击；
The security analysis shows it can prevent plaintext attack, conspiracy attack and forging attack.
安全性分析表明该方案能够防止明文攻击、合谋攻击和伪造攻击。
Ths system can resist conspiracy attack, simplify the executing process and reduce the traffic cost.
新的方案不仅避免了同谋攻击，而且简化了原方案的执行步骤，降低了通信量。
Ths system can resist conspiracy attack, simplify the executing process and reduce the traffic cost.
新的方案不仅避免了同谋攻击，而且简化了原方案的执行步骤，降低了通信量。
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