In the wake of the Great Wikileaks Dump, the US military is making the use of removable media — thumb drives, CDs, DVDs, etc. — on devices connected to the Defense Department’s SIPRNET network a court martial offense.

Maj. Gen. Richard Webber, commander of Air Force Network Operations, issued the Dec. 3 “Cyber Control Order” — obtained by Danger Room — which directs airmen to “immediately cease use of removable media on all systems, servers, and stand alone machines residing on SIPRNET,” the Defense Department’s secret network. Similar directives have gone out to the military’s other branches.

“Unauthorized data transfers routinely occur on classified networks using removable media and are a method the insider threat uses to exploit classified information. To mitigate the activity, all Air Force organizations must immediately suspend all SIPRNET data transfer activities on removable media,” the order adds.

It’s one of a number of moves the Defense Department is making to prevent further disclosures of secret information in the wake of the WikiLeaks document dumps. Pfc. Bradley Manning says he downloaded hundreds of thousands of files from SIPRNET to a CD marked “Lady Gaga” before giving the files to WikiLeaks.