samzenpus writes "A restricted 2,400 page-document put out by the MoD designed to help intelligence personnel with information security has been leaked onto the internet. Wikileaks notes that Joint Services Protocol 440 (JSP 440), was published in 2001 and lays out protocols to defend against hackers, journalists, and foreign spies. it says, 'Leaks usually take the form of reports in the public media which appear to involve the unauthorized disclosure of official information (whether protectively marked or not) that causes political harm or embarrassment to either the UK Government or the Department concerned... The threat [of leakage] is less likely to arise from positive acts of counter-espionage, than from leakage of information through disaffected members of staff, or as a result of the attentions of an investigative journalist, or simply by accident or carelessness.' " Looks like it's time to write JSP 441.