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Privacy-Preserving Multi-party Aggregate Signcryption for Heterogeneous Systems

机译:异构系统的隐私保护多方聚合签名加密

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To achieve heterogeneous communication from certificateless cryptography (CLC) to identity-based cryptography (IBC), we present a heterogeneous scheme that enables m senders in the CLC to transmit m message to n receivers in the IBC. In the proposed signcryption scheme, each sender is mapped to a distinct pseudo identity, so the sender's identity privacy preservation can be guaranteed. At the same time, to ensure the receiver's identity privacy, the identity information of all authorized recipients is mixed by the Lagrange interpolation polynomial during the signcryption process, which prevents the receiver's identity from being exposed. Compared with existing schemes, the proposed scheme presents efficient computational overhead and is suitable for heterogeneous environments. In addition, our scheme has the indistinguishability against adaptive chosen ciphertext attacks and existential unforgeability against adaptive chosen-message attacks in the random oracle model.
机译:为了实现从无证书密码学(CLC)到基于身份的密码学(IBC)的异构通信,我们提出了一种异构方案,该方案使CLC中的m个发送者能够向iBC中的n个接收者发送m条消息。在提出的签密方案中,每个发送者都映射到一个不同的伪身份,因此可以确保发送者的身份隐私得到保护。同时,为确保接收者的身份隐私,在签密过程中,所有授权接收者的身份信息均由Lagrange插值多项式混合,以防止暴露接收者的身份。与现有方案相比,该方案具有高效的计算开销,适用于异构环境。此外,在随机预言机模型中,我们的方案对于自适应选择密文攻击具有不可区分性,而对于自适应选择消息攻击则具有不可伪造性。

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