UK government anti-leak document is leaked

A Ministry of Defence document giving advice on how to stop documents leaking onto the internet has been leaked onto the internet.

The Defence Manual of Security is intended to help MoD, armed forces and intelligence personnel maintain information security in the face of hackers, journalists, foreign spies and others.

But the 2,400-page restricted document has found its way on to Wikileaks, a website that publishes anonymous leaks of sensitive information from organisations including governments, corporations and religions.

Known in the services as Joint Services Protocol 440 (JSP 440), it was published in 2001. As Wikileaks notes, it is the document that is used as justification for the monitoring of certain websites, including Wikileaks itself.