Compatibility and Timing Attacks for JPEG Steganalysis. (arXiv:2306.01317v1 [cs.CR])

This paper introduces a novel compatibility attack to detect a steganographic
message embedded in the DCT domain of a JPEG image at high-quality factors
(close to 100). Because the JPEG compression is not a surjective function, i.e.
not every DCT blocks can be mapped from a pixel block, embedding a message in
the DCT domain can create incompatible blocks. We propose a method to find such
a block, which directly proves that a block has been modified during the
embedding. …

attack attacks block compression detect domain embedded function high jpeg message novel pixel quality