Joint Services Publication 440

Joint Services Publication 440 ("JSP 440") is the name of a British 2001 Ministry of Defence 2,400-page restricted document describing requirements to assure the confidentiality, integrity, and availability of military computer systems. This has been interpreted in the media as instructions for avoiding leaks due to hackers, journalists, and foreign spies.

The publication was posted on Wikileaks on 3 October 2009.