标准模型下抗泄漏的IBE  

A LEAKAGE-RESILIENT IDENTITY-BASED ENCRYPTION SCHEME IN STANDARD MODEL

作　　者：李云[1] 张永平[2] 

机构地区：[1]江苏第二师范学院宿迁分院计算机系,江苏宿迁223800 [2]中国矿业大学计算机学院,江苏徐州221008

出　　处：《计算机应用与软件》2016年第1期316-320,329,共6页Computer Applications and Software

基　　金：江苏省教育厅自然科学基金项目(14K JD520006)

摘　　要：由于边信道和冷启动攻击的存在,以黑盒模型为基础的可证安全密码系统的密钥等机密信息会有泄漏,这就会导致密码方案的安全性受到破坏。针对这样的问题,提出一个标准模型下的基于身份的抗泄漏的加密方案。首先,给出抗泄漏的基于身份的加密方案的具体构造;接着,从理论上证明该方案的安全性和抗泄漏性能。方案的安全性是基于q-ABDHE假设运用线性无关的思想证明得到的,方案的抗泄漏性是通过提取器的合理使用得到的。该方案是针对选择密文攻击抗泄漏安全的,理论分析表明该方案的私钥相对泄漏率可以接近1/6。The existence of side channel attacks and cold boot attack may leak the confidential information of black box-based key of provably secure cryptographic systems. In this case, the safety of the cryptographic schemes could be destroyed. In view of this, we put forward a leakage-resilient identity-based encryption scheme in standard model. First, we gave the specific construction of our scheme. Then we proved theoreticallythe security and leakage-resilience performance of the proposed scheme. The security of the scheme was derived from the proof based on q-ABDHE hypothesis and used the idea of linearly independence, and the property of leakage resilience was obtained by reasonable use of an extractor. The proposed scheme is fully secure against the chosen ciphertext attack with leakage resilience. Theoretical analysis showed that the relative leakage ratio of the scheme was almost up to 1/6 for private key.

关 键 词：基于身份加密 抗泄漏 提取器 标准模型 双线性映射 q-ABDHE假设 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]