计算机应用研究2017，Vol.34Issue(1)：224-228,5.DOI:10.3969/j.issn.1001-3695.2017.01.051
密文类型可修改的基于格代理重加密方案
Dynamic type-based proxy re-encryption scheme based on lattice
摘要
Abstract
In order to construct an efficient type-based proxy re-encryption scheme that can resist the quantum attack,this pa-per cryptanalyzed Zhang’s IBPRE scheme based on lattice,and shown that the scheme was vulnerable to collusion attack so that the private key was leaked.It presented the first dynamic type-based proxy re-encryption scheme based on lattice hard problem,whose security proved reduced to LWE assumption tightly.The construction was IND-CPA-secure cryptosystem.The scheme not only had the functions of the traditional type-based proxy re-encryption scheme,but also could resist the quantum attack,and the delegator of the ciphertext could modify the type of ciphertext dynamically.The proposed scheme is more use-ful in practical applications.关键词
格/代理重加密/类型代理重加密/可证明安全/类型可修改Key words
lattice/proxy re-encryption/type-based proxy re-encryption/provable security/dynamic type分类
信息技术与安全科学引用本文复制引用
李子臣,张玉龙,杨亚涛..密文类型可修改的基于格代理重加密方案[J].计算机应用研究,2017,34(1):224-228,5.基金项目
国家自然科学基金资助项目（61370188）；北京市支持中央高校共建项目---青年英才计划；中央高校基本科研业务费专项资金资助项目 （）
