Topological study and Lyapunov exponent of a secure steganographic scheme
This work addresses security improvements for steganographic systems, particularly in information hiding applications, but appears incremental as it builds on prior topological studies of CIS2.
The researchers investigated the topological properties and Lyapunov exponent of the CIS2 steganographic scheme to enhance its security against attacks like estimated original attacks, demonstrating its robustness in such contexts.
CIS2 is a steganographic scheme proposed in the information hiding literature, belonging into the small category of algorithms being both stego and topologically secure. Due to its stego-security, this scheme is able to face attacks that take place into the "watermark only attack" framework. Its topological security reinforce its capability to face attacks in other frameworks as "known message attack" or "known original attack", in the Simmons' prisoner problem. In this research work, the study of topological properties of C I S 2 is enlarged by describing this scheme as iterations over the real line, and investigating other security properties of topological nature as the Lyapunov exponent. Results show that this scheme is able to withdraw a malicious attacker in the "estimated original attack" context too.