Steganalysis Lab

Two real statistical/structural checks, not a definitive scanner. The Chi-Square test looks at the whole image's histogram, so it reliably catches naive sequential LSB embedding (like this site's own Steganography tool) when a message fills a large share of the image's hiding capacity — but a short message tucked into a large image can go undetected, since it only disturbs a small fraction of the overall histogram. Neither check proves a file is clean.