caa a22 4500 605519161 CHVBK 20210128100729.0 cr unu---uuuuu 210128e20150901xx s 000 0 eng 10.1007/s10559-015-9773-2 doi (NATIONALLICENCE)springer-10.1007/s10559-015-9773-2 Using Captcha in Computer Steganography [Elektronische Daten] [V. Zadiraka, A. Kudin, I. Shvidchenko, B. Bredelev] A new approach to constructing steganographic systems with the use of Completely Automated Public Turing test to tell Computers and Humans Apart (CAPTCHA) is proposed. The general principles of CAPTCHA application for the construction of steganographic systems in cloud computer systems are considered. An authors' stegosystem based on these principles is proposed. The steganographic security is estimated for this stegosystem and the aspects of its implementation are discussed. Springer Science+Business Media New York, 2015 steganography nationallicence cloud information-communication systems nationallicence Turing test nationallicence CAPTCHA nationallicence general theory of optimal algorithms nationallicence information radius nationallicence Zadiraka V. V. M. Glushkov Institute of Cybernetics, National Academy of Sciences of Ukraine, Kyiv, Ukraine aut Kudin A. Institute of Physics and Technology, National Technical University of Ukraine "Kyiv Polytechnic Institute,”, Kyiv, Ukraine aut Shvidchenko I. V. M. Glushkov Institute of Cybernetics, National Academy of Sciences of Ukraine, Kyiv, Ukraine aut Bredelev B. V. M. Glushkov Institute of Cybernetics, National Academy of Sciences of Ukraine, Kyiv, Ukraine aut Cybernetics and Systems Analysis Springer US; http://www.springer-ny.com 51/5(2015-09-01), 801-807 1060-0396 51:5<801 2015 51 10559 https://doi.org/10.1007/s10559-015-9773-2 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10559-015-9773-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zadiraka V. V. M. Glushkov Institute of Cybernetics, National Academy of Sciences of Ukraine, Kyiv, Ukraine aut NATIONALLICENCE 700 1- Kudin A. Institute of Physics and Technology, National Technical University of Ukraine "Kyiv Polytechnic Institute,”, Kyiv, Ukraine aut NATIONALLICENCE 700 1- Shvidchenko I. V. M. Glushkov Institute of Cybernetics, National Academy of Sciences of Ukraine, Kyiv, Ukraine aut NATIONALLICENCE 700 1- Bredelev B. V. M. Glushkov Institute of Cybernetics, National Academy of Sciences of Ukraine, Kyiv, Ukraine aut NATIONALLICENCE 773 0- Cybernetics and Systems Analysis Springer US; http://www.springer-ny.com 51/5(2015-09-01), 801-807 1060-0396 51:5<801 2015 51 10559