Security of Public-Key Cryptosystems Based on Chebyshev Polynomials Over Z/pkZ

被引:9
|
作者
Yoshioka, Daisaburo [1 ]
机构
[1] Sojo Univ, Dept Comp & Informat Sci, Kumamoto 8600082, Japan
关键词
Chebyshev approximation; Public key cryptography; Protocols; Circuits and systems; Indexes; Chebyshev polynomials; sequences; commutative polynomials; public-key cryptography; ALGORITHM;
D O I
10.1109/TCSII.2019.2954855
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
A public-key cryptosystem using Chebyshev polynomials defined on a finite set has recently been developed, which is a kind of chaos-based cryptography. The security of this cryptosystem relies on the difficulty of finding the degree of Chebyshev polynomials from given parameters. In this brief, we propose polynomial time algorithms to identify the degree of Chebyshev polynomials modulo a prime power. We demonstrate that the cryptosystem based on Chebyshev polynomials modulo a prime power is not secure. This result also means that there are no commutative polynomials for constructing public-key cryptosystems modulo a prime power.
引用
收藏
页码:2204 / 2208
页数:5
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