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1. 贵州师范大学 数学与计算机科学学院,贵州 贵阳 550001
2. 贵州师范学院 数学与计算机科学学院,贵州 贵阳 550018
3. 华东交通大学 理学院, 江西 南昌 330013
[ "黄华伟(1978-),男,江西樟树人,贵州师范大学副教授,主要研究方向为密码学与信息安全。" ]
[ "彭长文(1980-),女,贵州大方人,贵州师范学院副教授,主要研究方向为差分方程及函数论。" ]
[ "瞿云云(1983-),男,贵州金沙人,贵州师范大学副教授,主要研究方向为密码学与信息安全。" ]
[ "李春华(1973-),男,江西宜丰人,华东交通大学副教授,主要研究方向为半群代数理论。" ]
网络出版日期:2015-08,
纸质出版日期:2015-08-25
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黄华伟, 彭长文, 瞿云云, 等. 遍历矩阵密码体制的安全性[J]. 通信学报, 2015,36(8):61-67.
Hua-wei HUANG, Chang-wen PENG, Yun-yun QU, et al. Security of the cryptosystems based on ergodic matrices[J]. Journal on communications, 2015, 36(8): 61-67.
黄华伟, 彭长文, 瞿云云, 等. 遍历矩阵密码体制的安全性[J]. 通信学报, 2015,36(8):61-67. DOI: 10.11959/j.issn.1000-436x.2015128.
Hua-wei HUANG, Chang-wen PENG, Yun-yun QU, et al. Security of the cryptosystems based on ergodic matrices[J]. Journal on communications, 2015, 36(8): 61-67. DOI: 10.11959/j.issn.1000-436x.2015128.
分析了基于有限域遍历矩阵的公钥密码体制的安全性。根据公钥,采取逆矩阵消去方法得到伪造私钥的线性方程组。从而证明了计算性TEME问题是多项式时间可解的,利用伪造私钥即可破解PZZ1密码体制的密文。在一些情况下,SEME 问题在多项式时间内可归约为离散对数问题,若密钥参数选取不当,PZZ2 密码体制是基于离散对数问题的,并不基于NP困难问题。
The security of the public-key cryptosystems based on ergodicmatrices over finite field was analysed.According to the public key
a system of linear equations for the forged secret key bits is obtained by inverse matrix elimination method.It is proved that the computational TEME problem is solvablein polynomial time and the ciphertext of the PZZ1 cryptosystem can be decrypted by the forged secret key.In some case the SEME problem can be reduced to discrete logarithm problem in polynomial time.If the key parameters are chosen improperly
then PZZ2 cryptosystem is based on discrete logarithm problem instead of NP hard problem.
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