通用可组合的组密钥交换协议
doi: 10.3724/SP.J.1146.2008.00042
Universally Composable Group Key Exchange Protocol
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摘要: 该文提出了一个通用可组合框架下的组密钥交换理想函数，并在防篡改硬件令牌的基础上，利用部分隔离状态下证据不可区分知识证明，设计了一个组密钥交换协议，安全地实现了这个理想函数。和采用CRS模型的协议相比，降低了把整个信任集中于一处带来的风险。提出的组密钥交换协议经过证明具有AKE安全，并且能够抵抗适应性敌手攻击和恶意参与者攻击。Abstract: In this article, a universally composable group key exchange ideal function is proposed and realized using witness indistinguishable proof of knowledge with partially isolated party based on the tamper-proof hardware token. Compared with protocols under the CRS model, the group key exchange protocol can greatly reduce the risk of putting all trusts in one place. The protocol is proved to be AKE secure and resistant to the attacks of adaptive adversaries and malicious insiders.
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