A New Development of Symmetric Key Cryptosystem

Security issues have become a main concern modern life. A powerful cryptosystem has to be practical, secure and able to be implemented on different platforms. The goal of this paper is to develop a basis of cryptographic scheme which utilizes some advanced transform techniques. A symmetric cryptographic system is proposed based on Shannon\´s concepts of "confusion" and "diffusion". It possesses high security levels as well as many other advantages.