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Paper Description


Image Encryption by Cipher Feedback Mode (CFB)


Authors: Yas A. Alsultanny
Abstract: Image encryption is one of the most important applications in transferring images through the internet and cellular phones, as well as being important in encryption of the satellite images. The cipher feedback mode (CFB) used in testing, its efficiency in image encryption. Five images are used in the testing with different block sizes, the highest degree of encryption obtained, when the input data block and the feedback blocks are of the same sizes, by using blocks of 8 bits, 16 bits, and 32 bits. The entropy is used to measure the distribution of the image gray levels after encryption, where the CFB mode of encryption gives entropy approximately (8) which is represented the optimal degree of encryption (for image of 28 = 256 gray level, as the pixels values in the image are distributed among more gray levels the entropy increase), with the size of the input block and the feedback block are of the same sizes.
Published in: International Journal of Innovative Computing, Information and Control (ICIC);3(3):589-596
URL: http://www.ijicic.org/06-005-1.pdf
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