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Hello everybody, welcome to Defcon. Id like to introduce Michael Perklin with ACL Stenography. Take it away. MICHAEL PERKLIN: Thank you. How is it going, guys? I happen to be here at DEF CON again. I think this would be an interesting talk for those of you interested in hiding things or finding hidden things depending if youre a Blackcat. I am a corporate investigator. I specialize in cyber crime. I am a digital forensic examiner. I take the geek side and legal support and smash them together. Thats what I do. In this talk, Ill be talking about what steganography is. I have examples much how it was used before it existed. And finally, Ill talk about ACLsteganography. So Lets get started. What is steganography? Its a Greek word. The origins of the word are Greek and it means concealed writing. There are two roots of the word. Steganos which means covered and protected and graphy, which means writing. I apologize if I am butchering the Greek. Sorry, grandma. Before the word