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Communication Dans Un Congrès Année : 2013

Lightweight chaos-based cryptosystem for secure images

Résumé

In the last two decades, several chaos-based cryptosystems have been proposed. Some of them have architecture comprising a layer of permutation and a layer of diffusion and these layers are simultaneously executed in a simple scan of plain-image pixels. In this kind of cryptosystems, due to the channel effect, a bit error(s) in the cipher-image produces, at the decryption side, a random bit error in the estimated plainimage. In this paper, we propose a cipher-block encryption algorithm in CBC (Cipher Block Chaining) mode. It consists of a permutation process on the bits achieved by a 2D-cat map, followed by a bitwise XOR operation. Here, each permuted bit (confusion phase) is immediately diffused in a simple manner in the same phase. Therefore, the confusion and diffusion effects are stronger and the cryptanalyses for permutation-only ciphers become ineffective.
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Dates et versions

hal-00872265 , version 1 (11-10-2013)

Identifiants

  • HAL Id : hal-00872265 , version 1

Citer

Zeinab Fawaz, Safwan El Assad, Mousa Farajallah, Ayman Khalil, René Lozi, et al.. Lightweight chaos-based cryptosystem for secure images. 8th International Conference on Internet Technology and Secured Transactions 2013: ISTP Workshop, Dec 2013, Londres, United Kingdom. pp.ID-276. ⟨hal-00872265⟩
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