In this paper, a novel block cryptographic scheme based on a 3-D Chen's chaotic system is proposed, in which permutation by a key-dependent shift approach and substitution by the XOR approach are combined. Two rounds of encryption are performed for the proposed encryption algorithm. The plaintext is first permuted and then substituted block by block in the first round, but is first substituted and then permuted block by block in the second round. As a result, the diffusion property can be achieved. To make the proposed scheme secure enough against known/chosen-plaintext attack, the ciphertext feedback method is adopted in the XOR process. Simulation results show that the proposed scheme is sufficiently sensitive to small changes of the plaintext; furthermore, it is fast enough for practical transmission of large multi-media files over public data communication network.
A Novel Block Cipher Based on Chaotic Maps
2008 Congress on Image and Signal Processing ; 3 ; 17-21
2008-05-01
661322 byte
Conference paper
Electronic Resource
English
Stream cipher system based on chaotic maps [4122-02]
British Library Conference Proceedings | 2000
|Secure transmission of images based on chaotic systems and cipher block chaining
British Library Online Contents | 2013
|Chaotic Stream Cipher with Feedback-Forefeed Structure
British Library Online Contents | 2002
|