Title :
Analysis of a type of digital chaotic cryptosystem
Author :
Hu, GuoJie ; Feng, Zhengjin ; Wang, Lin
Author_Institution :
Sch. of Mech. Eng., Shanghai Jiao Tong Univ., China
Abstract :
A type of digital chaotic cryptosystem was proposed which used a class of 1-D piecewise linear map to realize finite-precision chaotic encryption and decryption systems through the inverse system approach. In the general structure of encryption systems, a dynamical system Σ (·) is used to connect the n-order delay line with the input terminal. The decoder is sensitive to all parameter mismatches, so it can provide high security of the encrypted signals. In this paper we show that this cryptosystem can not frustrate chosen-ciphertext attack. Consequently, it may be possible to recover the key with good accuracy.
Keywords :
chaos; cryptography; delay lines; piecewise linear techniques; 1-D piecewise linear map; chosen-ciphertext attack; digital chaotic cryptosystem; dynamical system; finite-precision chaotic decryption; finite-precision chaotic encryption; input terminal; inverse system approach; n-order delay line; parameter mismatches; security; Chaos; Chaotic communication; Communication system security; Cryptography; Decoding; Delay lines; Equations; Mechanical engineering; Piecewise linear techniques; Signal generators;
Conference_Titel :
Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on
Print_ISBN :
0-7803-7448-7
DOI :
10.1109/ISCAS.2002.1010263
