Application of the general theory of optimal algorithms in cryptography, steganography, and blockchain technology

Analysis and synthesis of one-way and trapdoor functions are the basis for security estimates and the construction of cryptographic transformations, steganographic systems, and blockchain consensus protocols. The paper considers the information-computational approach to creating such functions based on the general theory of optimal algorithms and their applications in cryptography, steganography, and the analysis and synthesis of blockchain consensus protocols. Keywords: a general theory of optimal algorithms, one-way function, trapdoor function, cryptosystem’s security estimates, steganography, blockchain.