Abstract. The new approach for information security estimate for modern information and communication systems based on the general theory of optimal algorithms is proposed. The relationship between the quality of information and the cryptographic and steganographic systems security is shown. The choice of the radius of information as an index of security for various information security systems is justified.
Keywords: information security, cryptology, steganography, the general theory of optimal algorithms, information radius.
1 V. M. Glushkov Institute of Cybernetics, National Academy of Sciences of Ukraine, Kyiv, Ukraine,
e-mail: zvk140@ukr.net.
2 Institute of Physics and Technology of National Technical University of Ukraine “Igor Sikorsky Kyiv
Polytechnic Institute,” Ukraine,
e-mail: pplayshner@gmail.com.