AntiSteg is a command line tool for cleaning images and widely used Windows AVI files of potentially harmful steganographical content. Many popular image formats (especially those spread via the Web), as well as AVI movie formats are handled by the tool.
Steganography is a means by which information is hidden inside of images/movies (often via high-encryption algorithms), making them completely invisible to all standard image viewers/movie players. Stegged images/movies can carry extremely harmful payloads, which include, but are not limited to: 1. Child pornography/snuff movies 2. Viruses, Trojans, Spyware, Spamware, and other Malware 3. Sensitive personal/corporate Data