论文部分内容阅读
在现有的一些匿名认证方案中,成员不能自主选择子密钥,示证者不能自由选择匿名集,导致方案的计算代价较大,匿名认证过程较复杂.为了解决这两个问题,本文提出了一种新的门限追踪匿名认证方案.该方案允许成员自主选择子密钥,计算屏蔽子密钥作为签名私钥以保护成员的子密钥;示证者使用自由选择的匿名集和自己的签名私钥,借助1/n签名实现匿名认证;基于Lagrange插值,t个成员合作实现门限追踪,并验证追踪到的示证者身份的真实性.与现有方案相比,该方案计算代价较小,成员自主性更大,匿名认证更简单,匿名追踪更安全.在离散对数假设和DDH(Decisional Diffie-Hellinm)假设的前提下,该方案满足匿名性、门限可追踪性,可抵抗外部伪装攻击和一致性攻击.
In some existing anonymous authentication schemes, the members can not choose the sub-key autonomously, and the demonstrators are not free to choose the anonymous set, which leads to the large computational cost of the scheme and the complicated process of anonymous authentication.In order to solve these two problems, A new threshold-based anonymous authentication scheme is proposed, which allows members to choose their own sub-keys and calculate their sub-keys as private keys to protect their sub-keys. The witness uses a freely chosen anonymous set and his own Signature private key, anonymous authentication with 1 / n signature, t membership tracking based on Lagrange interpolation, and verifying the authenticity of the tracked witness identity.Compared with the existing schemes, this scheme is more cost-effective Small, more autonomous members, simpler anonymous authentication and more secure anonymous tracking.Under the premise of the discrete logarithm hypothesis and DDH (Decisional Diffie-Hellinm) hypothesis, this scheme satisfies the anonymity, threshold traceability, Disguised attacks and consistent attacks.