Английски език
This book presents methods to improve information security for protected communication. Interdisciplinary scientific-engineering concepts are combined and applied, including cryptography, chaos theory, nonlinear and singular optics, radio-electronics and self-changing artificial systems. Additional ways to improve information security with optical vortices as information carrier and self-controlled nonlinearity are presented. Moreover nonlinearity plays the role of an "evolving" key. The presented solutions to the problems allow to treat the universal phenomenon of deterministic chaos with view to information security problems on the basis of examples of both electronic and optical systems. Besides, the vortex detector and communication systems are suggested. Mathematical models of the chaos oscillator as a coder in the synchronous chaotic communication and appropriate decoders are developed. Their efficiency is shown analytically and experimentally. Cryptologic features of analyzed systems are discussed. A series of new structures for confident communication is proposed.
