GENERATION OF THREE RANDOM NUMBERS SEQUENCES FOR CRYPTOGRAPHIC INFORMATION SECURITY SYSTEMS

The article is devoted to the development of a pseudorandom number generator. Some solutions that use feedback in their structures are provided. Such solutions are suitable for cryptography, since high computational complexity of searching for previous values of a random variable is ensured. However, the use of feedback in the structural diagram of the algorithm leads to the emergence of a stochastic relationship between adjacent values of the generated sequence. The proposed generator is based on the idea of using a three-channel system with mutual communication function, where each channel is a generator that forms an output signal based on the output signals of two other generators. This made possible to obtain three independent sequences of pseudorandom numbers with a significantly weakened connection between the previous and subsequent values. Due to this approach, the repetition period of the generated numbers significantly increases, since the repetition of generation requires simultaneous appearance of initial values at the outputs of three generators. The probability of such an event decreases by many orders of magnitude. Generators operate in parallel, so the system performance does not decrease.