A value transformation and random permutation-based coloured image encryption technique
by Mahmood Al-Khassaweneh; Shefa Tawalbeh
International Journal of Information and Computer Security (IJICS), Vol. 5, No. 4, 2013

Abstract: With the recent advances in multimedia transmission and storage, security becomes an important issue to protect data from unauthorised access. There are several methods proposed to secure data including watermarking, encryption, steganography and others. Image encryption, which is widely used in many applications to provide high levels of security such as internet communication, multimedia systems and medical imaging, is proposed in this paper. The proposed encryption method is based on value transformation in which the image pixels are transformed to new values and random permutations in which the rows and the columns of the image are shuffled. The value transformation step is applied on pixels values through performing logical AND operation between their values and specific value in order to get new transformed image with new pixels values unrelated to the original pixels. Moreover, the random permutation step is applied to the columns and rows of the transformed image. In this step the rows and the columns are shuffled respectively using random permutation key to produce the encrypted image. The same generated key is used to shuffle both the rows and the columns of the image. The simulation results show the effectiveness and the security of the proposed method.

Online publication date: Wed, 30-Jul-2014

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