Методи і засоби блокового шифрування підвищеної стійкості на основі арифметичних операцій за модулем

Abstract

The dissertation is devoted to the development of symmetric cipher methods of the increased security for the protection within computer systems. On the basis of the conducted analysis of existent approaches, in relation to development of methods and modes of the block ciphering, methods of the symmetric block ciphering on the basis of arithmetic operations after the module are development the methods of ciphering for increased cryptographic security based on the arithmetic operations after the module, in that the module is used as one of components of the secret key, and that envisage the driven block chaining, and combined development of the keys. These methods are implemented as software and hardware means for ciphering within computer systems. Testing of the software means of symmetric block encryption allows to prove the practical durability of the proposed methods, and it also shows increasing of encryption speed comparatively with means of symmetric block encryption based on arithmetic operations.