Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/17041
Title: Cryptanalysis of two chaotic encryption schemes based on circular bit shift and XOR operations
Authors: Li, C
Li, S
Alvarez, G
Chen, G
Lo, KT 
Keywords: Chaos
Chosen-plaintext attack
Cryptanalysis
Delayed chaotic neural network
Differential cryptanalysis
Encryption
Known-plaintext attack
Issue Date: 2007
Publisher: Elsevier Science Bv
Source: Physics letters, section a : general, atomic and solid state physics, 2007, v. 369, no. 1-2, p. 23-30 How to cite?
Journal: Physics Letters, Section A: General, Atomic and Solid State Physics 
Abstract: Recently two encryption schemes were proposed by combining circular bit shift and XOR operations, under the control of a pseudorandom bit sequence (PRBS) generated from a chaotic system. This Letter studies the security of these two encryption schemes and reports the following findings: (1) there exist some security defects in both schemes; (2) the underlying chaotic PRBS can be reconstructed as an equivalent key by using only two chosen plaintexts; (3) most elements in the underlying chaotic PRBS can be obtained by a differential known-plaintext attack using only two known plaintexts. Experimental results are given to demonstrate the feasibility of the proposed attack.
URI: http://hdl.handle.net/10397/17041
DOI: 10.1016/j.physleta.2007.04.023
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