A version of Organization of Multithread Processing of Confidential Data on the Basis of Cellular Automata

Рurpose of research is to develop a multithread processing system based on an encryption algorithm using cellular automata and to study statistical performance indicators depending on the hardware components and the size of the input block, and to develop recommendations for improving the cryptostrength of the method.

Methods. A mathematical model of the encryption method using a floating window based on cellular automata was considered [3]. To study the speed of confidential data processing, there was developed a variant of the organization of the structure of the software module with an extended block of setting parameters that determine the dimension of the matrix, the line of activation of the bit neighborhood of the processed elements, the number of parallel computations (threads) and the rule of expansion of the boundary elements of the matrix. A method for the development of the dependence curve of the processing time and inital parameters that can be applied both to process individual files and continuous network subscriber data flow, is proposed.

Results. The cryptographic module implementing the encryption method on the basis of cellular automata, which specific feature is a multithread mode of operation and dynamic control of the block of initial parameters, was developed. Recommendations for setting the neighborhood of the active elements of the matrix and the number of threads taking into account the architecture of the CPU were formulated. Experimental studies were conducted to confirm the completeness and correctness of the proposed solutions. The expediency of using high-speed hard disk drives and saving the results of encryption in asynchronous segmented mode with working thread-bind results was revealed.

Conclusion. The proposed version of the organization of the confidential data processing system in the form of a software module, taking into account the features of the hardware, allows optimization of the processing speed, and the compliance with the recommendations for the expansion of the neighborhood in the block transformation can improve the cryptographic algorithm based on cellular automata with a floating window.

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