TY - JOUR
T1 - Cryptanalysis of two chaotic encryption schemes based on circular bit shift and XOR operations
AU - Li, Chengqing
AU - Li, Shujun
AU - Alvarez, Gonzalo
AU - Chen, Guanrong
AU - Lo, Kwok-Tung
PY - 2007/9/10
Y1 - 2007/9/10
N2 - 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. © 2007 Elsevier B.V. All rights reserved.
AB - 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. © 2007 Elsevier B.V. All rights reserved.
KW - Chaos
KW - Chosen-plaintext attack
KW - Cryptanalysis
KW - Delayed chaotic neural network
KW - Differential cryptanalysis
KW - Encryption
KW - Known-plaintext attack
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UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-34548361693&origin=recordpage
U2 - 10.1016/j.physleta.2007.04.023
DO - 10.1016/j.physleta.2007.04.023
M3 - RGC 21 - Publication in refereed journal
SN - 0375-9601
VL - 369
SP - 23
EP - 30
JO - Physics Letters, Section A: General, Atomic and Solid State Physics
JF - Physics Letters, Section A: General, Atomic and Solid State Physics
IS - 1-2
ER -