论文部分内容阅读
采用双线性对原理,提出无需随机预言模型下可证明安全的基于身份门限的解密方案,解决了当前基于身份门限解密方案需要依赖随机预言模型,才能证明其安全性或其安全性归约松散性的问题.给出一个新的密钥提取算法,模拟者可成功应答敌手的私钥提取查询,使方案的选择密文安全性证明具有紧致的安全归约.与现有的基于身份的门限解密方案相比,该方案在不依赖随机预言模型下也能满足紧致安全性归约.
Based on the principle of bilinear pairing, this paper proposes an identity-based decryption scheme that can prove security without the random prophecy model and solves the problem that current identity-based decryption schemes need to rely on the random prophecy model in order to prove that the security or its security is loosely reduced A new key extraction algorithm is proposed, in which the simulator can successfully answer the adversary’s private key extraction query to make the selection ciphertext security certificate have a compact security reduction.Compared with the existing identity-based Compared with the threshold decryption scheme, this scheme can satisfy the compact security reduction without relying on the random prediction model.