抗泄漏的CCA安全的加密方案

Leakage Resilient Encryption Against Adaptive Chosen Ciphertext Attack

由于大量攻击可能泄漏传统密码方案中要求绝对保密的信息,进而破坏了传统密码方案的安全性,所以设计抗泄漏的安全密码方案成为密码研究的一个迫切需要解决的问题,尤其从2009年至今更是吸引了广大学者的注意,取得一定成果。本文在基于身份的抗泄露的自适应选择明文攻击(CPA)安全的加密方案基础上,进行改进,通过结合一个强的一次真实模拟可提取的非交互零知识协议,取得基于身份的抗泄露自适应选择密文攻击(CCA)的安全加密方案,提高了系统的安全性能。

Recently, a lot of attacks leak some important information which should be kept secret absolutely, so the security of many traditional cryptosystems is broken. Since 2009, designing cryptosystems which are resilient to leakage gets more and more attention. On the basis of an identify-based leakage resilient CPA secure encryption, the paper associates with a strong one-time true simulation extractable NIZK, ultimately gains an identify-based leakage resilient CCA secure encryption, which improves the security.