基于证书的有限授权无需转换代理密码方案  

Certificate-based Authorization-limited Transformation-free Proxy Cryptography Scheme

作　　者：郑志伟[1] 黄振杰[1] 

机构地区：[1]闽南师范大学计算机学院,福建漳州363000

出　　处：《闽南师范大学学报（自然科学版）》2016年第1期54-61,共8页Journal of Minnan Normal University：Natural Science

基　　金：国家自然科学基金资助项目(61170246);福建省中青年教师教育科技项目(JA14202)

摘　　要：针对现有的有限授权无需转换代理密码系统存在证书管理问题和秘钥托管问题,将基于证书加密方案(CBE)与有限授权无需转换代理密码系统(AL-TFP)相结合,提出了一个基于证书的有限授权无需转换代理密码方案.在双线性Diffie-Hellman困难问题的假设下,证明了该方案在适应性选择密文攻击下是安全的.与现有的基于证书代理密码系统相比,具有计算成本低、密文长度短的优良特性.Concerning the certificate management problem and the key escrow problem in the existing authorization-limited proxy cryptosystems. A certificate-based authorization-limited transformation-free proxy cryptography scheme was proposed by combining the certificate-based encryption scheme （CBE） with authorization-limited proxy cryptosystems （AL-TFP）. Under Bilinear Diffie-Hellman assumption , the proposed scheme is provably secure against adaptive chosen ciphertext attracks. Com-pared with the existing certificate-based proxy cryptosystems , the proposed scheme have the excellent features with low compu-tational cost and short length of ciphertext.

关 键 词：基于证书加密 代理密码系统 双线性对 随机预言机模型 有限授权 

分 类 号：G807.01[文化科学—体育训练]