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Steganography deals with hiding of data in images and steganalysis reveals the presence of data and also the data. In this paper, we propose a steganography technique that is based on randomizing the sequence of cipher bits. We compute the suitability measure of the various random sequences of the cipher bits against a given image and select the random sequence closest to the image. We generate these...
This Cellular Automata (CA) has been used in cryptography over the past decade for its advantages in generating pseudo-random sequence. In this paper, a novel encryption algorithm for image in our project is proposed, which is based on an improved two-dimensional CA approach. A weighted and p-interval two-dimensional CA approach forms a new evolutionary matrix including lots of optional parameters...
In this paper, an efficient video encryption scheme is constructed by image key and is based on hyper-chaos system. The chaotic lattices are used to generate pseudorandom sequences and then selected pixel and bit pixel of image key encrypt frame blocks one by one. By iterating chaotic maps for certain times, the generated pseudorandom sequences obtain high initial-value sensitivity and good randomness...
A new encryption scheme for digital images based on compound Chaos algorithm is presented in this paper. The compound Chaos algorithm combines the Lorenz Chaotic system and Logistics map to generate the pseudo-random sequences. Then the pseudo-random sequences are used to produce the permutation matrix to encrypt the digital image. Matlab is used for simulation testing of the image encryption. Algorithm...
An optoelectronic parallel processing system for asynchronous stream cipher has been constructed to demonstrate potential capability of free-space optical interconnections. Two digital smart pixel arrays are employed for generation of pseudorandom patterns and encryption.
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