Journal
PHYSICS LETTERS A
Volume 376, Issue 10-11, Pages 1003-1010Publisher
ELSEVIER
DOI: 10.1016/j.physleta.2012.01.040
Keywords
Chaos; Chaotic cryptosystem; Image encryption; Chen's chaotic system
Categories
Funding
- National Natural Science Foundation of China [61070163, 60973146, 61003284, 61141007]
- Natural Science Foundation of Shandong Province, China [ZR2009GM036, ZR2011FM023]
- Shandong Province Outstanding Research Award Fund for Young Scientists of China [BS2011DX034]
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A type of chaotic encryption scheme by combining circular bit shift with XOR operations was proposed in 2006 based on iterating chaotic maps. Soon after the proposal, it was cryptanalyzed and improved. Unfortunately, there are still two drawbacks in the two improved schemes. To strengthen the performance of the focused type of scheme, a new improved scheme based on Chen's chaotic system is proposed in this Letter. Simulation results and theoretical analysis show that our improved scheme is immune to information extracting by chosen plaintext attack and has expected cryptographic properties. (C) 2012 Elsevier B.V. All rights reserved.
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