Phrack, the infamous online magazine published by underground hackers, is shutting down. The e-zine, notorious for publishing controversial security-themed articles on phreaking, reverse engineering, cryptography spying and electronics, ends a 20-year run with a hardcover edition scheduled for release at the end of July. The popular Hacker Manifesto was released in the seventh issue of Phrack and has served as a rallying cry for young hackers ever since the mid-1980s.