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基于椭圆曲线的会议密钥协商协议

Keywords: 会议密钥协商,椭圆曲线,椭圆曲线数字签名算法

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Abstract:

为了提高错误容忍的会议密钥协商协议的执行效率,利用椭圆曲线数字签名算法与椭圆曲线Diffie-Hellman密钥交换协议,提出了一种认证广播信道下前向安全的会议密钥协商协议,并分析了该协议的安全性与执行效率.在椭圆曲线离散对数问题难解的假设下,该协议中被动攻击者得不到诚实参与者协商出的会议密钥的任何信息,且无论存在多少恶意参与者,诚实参与者都能协商出一个共同的会议密钥.与现有方案相比,在相同安全强度下,该协议具有通讯量更小、计算效率更高等特点.

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