Abstract
This work presents a comparative study of the efficiency of the StegExpose tool. StegExpose implements the LSB steganalysis methods: Chi Square, RS Analysis, Primary Sets, and Sample Pair, as well as a proprietary fusion method. For each of the 30 images in the database, text was embedded using five steganography tools: Stepic, LSBSteg, Steghide, Outguess and F5. Also, the sizes of the secret message was iterated in increments of 10%. The experiments show that the performance of a steganalysis method depends on the steganography technique used. Therefore, the steganalysis tools detected data hidden in the stego-images generated by Stepic and LSBSteg, but did not detect stego-images generated by Steghide, Outguess and F5, which use different methods of LSB.