期刊
PHYSICS LETTERS A
卷 372, 期 38, 页码 5973-5978出版社
ELSEVIER
DOI: 10.1016/j.physleta.2008.07.057
关键词
cryptanalysis; chaotic encryption; keystream; hyper-chaos; shuffle
This Letter proposes two different attacks on a recently proposed image based on hyper-chaos. The cryptosystem under study proceed first by shuffling the image rows and columns to disturb the high correlation among pixels by iterating the logistic map. Second, a keystream is generated to mix it with the pixels of the shuffled image using hyper-chaos. These two processes in the encryption stage present weakness, and a chosen plaintext attack and a chosen ciphertext attack can be done to recover the ciphered-image without any knowledge of the key value. It just demands three couples of plaintext/ciphertext to break totally the cryptosystem. (C) 2008 Elsevier B.V. All rights reserved.
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