Joint Worldwide Intelligence Communications System
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The Joint Worldwide Intelligence Communications System (JWICS) 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 TOP SECRET and SCI) by packet switching over the TCP/IP protocols in a secure environment. It also provides services such as hypertext documents and electronic mail. In other words, the JWICS is the DoD’s classified version of the civilian Internet together with its counterpart, the SIPRNet.
JWICS superseded the earlier DSNET2 and DSNET3, the Top Secret and SCI levels of the Defense Data Network based on ARPANET technology.
