电子科技大学学报2016，Vol.46Issue(6)：964-968,5.DOI:10.3969/j.issn.1001-0548.2016.06.015
对类型可修改的基于身份代理重加密方案的改进
Further Improvement of a Dynamic Type and Identity-Based Proxy Re-Encryption Scheme
摘要
Abstract
Dynamic type information of ciphertext can be modified properly so that it can be well applied in a practical cloud storage environment. In order to meet the application requirements, Liuet al proposed a dynamic type and identity-based proxy re-encryption (PRE) scheme based on Ibraimiet al’s scheme. Their scheme not only keeps the traditional core function of PRE scheme, but also makes sure that the owner of ciphertext can modify the type information at any time. However, after careful security analysis it found that Liuet al.’s scheme has two security flaws. Firstly, the dynamic type information lacks of verification, the adversary can modify the type tag. Secondly, the dynamic type information causes a conditional chosen plaintext attack. Thus we further improve Liu et al.’s scheme and give the security analysis.关键词
云存储/可证明安全性/代理重加密/基于类型和身份的代理重加密Key words
cloud storage/provable/proxy re-encryption/type and identity-based proxy re-encryption security分类
信息技术与安全科学引用本文复制引用
张新鹏,许春香,张晓均,邓江,黄新..对类型可修改的基于身份代理重加密方案的改进[J].电子科技大学学报,2016,46(6):964-968,5.基金项目
国家自然科学基金(61370203)；总后研究所项目(BS211L019-3) （61370203）
