Abstract: This study mainly studies a cryptoanalytic method of searching for the secret key and its length, in this research, a review of works devoted to solving the cryptanalysis problem of classic and asymmetric encryption algorithms based on new technologies of artificial intelligence-bio-inspiration methods simulating the processes of evolution of wildlife was conducted. The main distinctive features of the application of these methods are described and experimental results are shown which demonstrate the possibility of using these methods for solving cryptanalysis problems.