An Approach to Assessing Information Security Effectiveness in Control Systems

摘要

In this paper, we propose two block cipher modification methods that can be used for preliminary encryption of messages embedded in stego objects. These modifications preserve the cryptographic strength of the ciphers, but violate the pseudorandomness of the cryptograms, which protects the stegosystems from detection by the NIST tests. Experimental results of detection effectiveness for the stegosystems after cipher modification depending on the rate of information embedding are presented.