Cryptanalysis of an Encryption Scheme Based on Blind Source Separation

Details Cryptanalysis of an Encryption Scheme Based on Blind Source Separation Cryptanalysis of an Encryption Scheme Based on Blind Source Separation

2006-08-04

arxiv.org/abs/cs/0608024v1

IEEE Transactions on Circuits and Systems-I: Regular Papers, vol. 55, no. 4, pp. 1055-1063, April 2008

Computer Science

Cryptography and Security

8 pages, 10 figures, IEEE format

Scientific paper

10.1109/TCSI.2008.916540

Recently Lin et al. proposed a method of using the underdetermined BSS (blind source separation) problem to realize image and speech encryption. In this paper, we give a cryptanalysis of this BSS-based encryption and point out that it is not secure against known/chosen-plaintext attack and chosen-ciphertext attack. In addition, there exist some other security defects: low sensitivity to part of the key and the plaintext, a ciphertext-only differential attack, divide-and-conquer (DAC) attack on part of the key. We also discuss the role of BSS in Lin et al.'s efforts towards cryptographically secure ciphers.

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