Proper noun
SIPRNET
(US) The Secret Internet Protocol Router Network: the U.S. Department of Defense's largest network for the exchange of classified information and messages at the SECRET level.
Although information about SIPRNet and General Carr’s evidence was published long ago, few journalists seem to be aware of this. Source: Internet
Cloud native security applications, which can be implemented in secure environments like SIPRNet, further provide a robust level of automation and collaboration that isn’t possible using local development and limited server-based software delivery. Source: Internet