The US government has appointed a well-known hacker to its Homeland Security Advisory Council.
Jeff Moss founded the DefCon and Black Hat hacking conferences - he is one of the world's most famous professional hackers, operating under the alias of the Dark Tangent. But he has always worked for corporations rather than targeting them.
Before joining the council Moss was a security consultant hired to test company's systems, and a director at the Secure Computing Corporation, where he helped established the professional services department for the US, Asia and Australia. He has also worked for consulting firm Ernst & Young in its information system security division.
Moss was sworn in on Friday by defence secretary Janet Napolitano. The move is the latest in a series of measures that the US government is employing to tackle cyber security.