The model of cryptography based on cellular automata three-dimensional hybrids. Symmetric cryptographic model based on the calculation of the pre image of three-dimensional hybrid cellular automata called 3dhca (three dimensional hybrid celiular automatic machines). Each step of the implementation of encryption and decryption process are employed two main rules and contour with sensitivity in the same direction.The sensitivity of the main rule may be the n (North), s (South), l (East), (West), f (front) and K (bottom). The bits out of the rule are determined only by the contour bit sensitive main rule, the text plan is divided into blocks, and these blocks are transformed into bits that correspond to one of the original lattice.The process of encryption is achieved by the development behind, also known as the calculation of pre image, and decryption is carried out through the time course for front of cellular automata.
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