Encryption by block based on rekeying and inter-intra pixel permutation Online publication date: Tue, 30-Jul-2024
by Rachid Rimani; Adda Ali-Pacha; Naima Hadj Said
International Journal of Information and Computer Security (IJICS), Vol. 24, No. 1/2, 2024
Abstract: The growing use of ICT exposes exchanges to certain risks, which require the existence of adequate security measures of information. The data encryption is often an effective way to meet these requirements of security and confidentiality. This paper present a novel cryptosystem by block depended on the secret key and subkeys and respect the fundamental principles of modern cryptography for encrypting images, since images have some intrinsic features such as large data capacity, strong correlation between adjacent pixels and high redundancy of information. The proposed cryptosystem is based on rekeying to apply permutation inter-intra pixel of each block according to the secret key and subkeys using a random, nonlinear, dynamic and secret scrambled technique there be called RNDSS. Experimental tests demonstrate the high security of the proposed cryptosystem with RNDSS technique and show the high sensitive dependence to any subtle change in the secret key, which guarantees the security against brute force attacks.
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