<p>If a Chinese official had to come up with a list of his government's enemies overseas, a 51-year-old former journalist and ex-U.N. official in Toronto proudly admits he would be ranked near the top.</p>
<p>An active member of two computer hacking groups, the man, who goes by the alias Oxblood Ruffin, is leading an effort to help Chinese dissidents by providing them software that allows Internetusers to avoid Beijing's censors. Oxblood is a member of Cult of the Dead Cow, a hacker group that started in the mid-1980s. He is also active in a newer, related group, Hacktivismo, which last month released Camera/Shy, a free program that helps encrypt content on the Internet.</p>