Modification of Rc6 Block Cipher Algorithm on Digital Image

Abstract

Abstrack. In the digital image of each pixel consists of three components, namely R, G, and B. If the three components are combined in a block then the block will have data with 24 bit or three characters. By default shortage of bits in each block will be filled by the next bit of the pixel so that each block will have the appropriate size is 32bit. The problem that happens is if the number of pixels is not in accordance with the division so it is necessary to block or adding padding bit 0 in register block, if padding occurs then the encrypted data size will change that affects the size of the image will change and will be hard pressed in preparing the return data encryption results in the form of images.

Design and implementation of proposed 320 bit RC6-cascaded encryption/decryption cores on altera FPGA

“…Moreover, Mardiana et al [16] address efficiently the modification for implementing the RC6 block cipher algorithm for a digital image and describe the design and performance of the algorithm for color images and grayscale as well and it reduce the capacity (i.e. size) of variables to improve the algorithm in terms of memory consumed and time required.…”

Digital Image Encryption using Logistic Chaotic Key-based RC6

“…Owing to the ability of the logistic map to generate unpredictable and uncorrected characteristics, it has been used in the field of cryptography as a pseudorandom number generator, cryptographic algorithm and cryptanalysis [28][29][30][31].…”