A Picture is Worth a Thousand Bytes: Statistically innocent LSB steganography presented at KiwiCon 2011

by Edwin Hermann,

Tags: Security

Summary : The point of steganography is not only to conceal a message inside an image, but also to conceal the fact that a hidden message even exists at all in the image. A common method is to manipulate the least significant bit(s). However, techniques based on this method typically suffer from a fundamental weakness: their ability to be detected statistically using the chi-squared test. In this presentation Edwin demonstrates an original algorithm that stands up to the chi-squred test in all but a few special cases. Reliable detection of data embedded using this algorithm is potentially very difficult, if not impossible.