-
[show abstract]
[hide abstract]
ABSTRACT: Recently, the chaos based cryptographic algorithms have suggested some meaningful techniques to develop efficient image encryption schemes. In this paper, we propose a new digital image encryption scheme based on the piecewise linear chaotic map (PWLCM) in order to meet the requirements of the secure encryption. The proposed scheme is described in detail, along with the security analyses including key space analysis, sensitivity analysis, information entropy analysis and differential attack analysis. The results show that the suggested image encryption scheme has some properties desirable in a good security cryptosystem.
Cybernetics and Intelligent Systems, 2008 IEEE Conference on; 10/2008
-
[show abstract]
[hide abstract]
ABSTRACT: In this paper, a novel block digital image encryption scheme based on a chaotic coupled map lattices (CML) is reported. Within this scheme, an original image is decomposed into sub-blocks with a given size, and an external secret key with 192-bit is used and mapped to the system parameters, which are employed to generate a spatiotemporal chaotic binary sequence matrix to encrypt the block original image. Besides, the former sub-block encrypted result will be acted as a feedback to the following sub-block encryption proc-ess. The proposed scheme is described in detail, along with the security analyses such as key space analysis, sensitivity analysis, information entropy analysis and correlation coefficients analysis of adjacent pixels. The computer simulation results indicate that the suggested image encryption scheme has some properties desirable in a good security cryptosystem.
International Conference on Natural Computation. 10/2008; 4:595-599.
-
[show abstract]
[hide abstract]
ABSTRACT: In this paper, a novel block encryption cipher based on chaotic dynamical system is proposed. The algorithm operates on 64-bit plaintext blocks, and the key is 128 bits long. In round function, the logistic chaotic map and three algebraic group operations are mixed. As the algorithm is a Feistel network, it can be used for both encryption and decryption. Furthermore, the security of the algorithm is analyzed in details. The cryptanalyse results indicate that the algorithm has good diffusion and confusion properties, and it is very sensitive to the plaintexts and keys. Finally, by using differential cryptanalysis we found the upper bound of difference character capability for this cipher is 2<sup>-6.6601</sup> and 2<sup>-17.1862</sup> when block length is 16 and 32 bits long, respectively.
Natural Computation, 2007. ICNC 2007. Third International Conference on; 09/2007
