
The Secret Internet Protocol Router Network (SIPRNet) is `a system of interconnected computer networks used by the U.S. Department of Defense and the U.S. Department of State to transmit classified information (up to and including information classified SECRET) by packet switching over the TCP/IP protocols in a `completely secure` environment`...
Found on
http://en.wikipedia.org/wiki/SIPRNet

US military secret internet - Secret Internet Protocol Router Network
Found on
http://www.psywar.co.uk/glossary.php

(DOD) See SECRET Internet Protocol Router Network.
Found on
https://www.encyclo.co.uk/local/21254
No exact match found.