Kevin Mytnyk- American hacker, cyber security consultant and author of several books. Born in 1963 in Los Angeles. In his youth, he became famous for his cybercrimes, in particular, breaking into the computer systems of large companies. After his arrest and imprisonment, Mytnyk changed his path, becoming a cyber security consultant. He is the author of the books "Ghost in the Wire" and "The Art of Staying Undetected. Who Still Reads Your Emails?", where he describes his experiences and offers advice on how to protect your information from hacker attacks. His story is an example of the transformation from a legendary hacker to a security expert.