Effective Steganography Detection Based On Data Compression

(The main idea: The compression used for stegotext detection. It is known that an embedding message breaks statistical structure of the container, increasing its entropy. Consequently, the full container will compress worse than empty. Let us consider the example: A, B empty and full container respectively. Table 1: Container size before and after compression container.. container size before compr. size after compr A 500 320 B 500 300 Add content of suspected container C into A and B. Compress them. Compare added content sizes before and after compression. Table 2: Content size of C container before compr. after compr. container size before compr. size after compr CA 50 45 CB 50 20 It could be asserted that container C is statistically depend with B, which ensures good compression. This principle used in attack on Texto. The detection accuracy exceeds 99.98% when text size is larger than 400 bytes.) See th is article bel ow: