Access to ECOP is only through SIPRNET, and an authorized . and the lot and serial numbers have been sent by SIPRnet to ISN/CATR Margaret Mitchell. military's Secret Internet Protocol Router Network, known as SIPRNet, believed to have been the ultimate source for the cables obtained by the whistleblower website. PSDS2 disseminates this intelligence, surveillance, and reconnaissance data through multiple means, including the SIPRNet via Web-based applications.