Classified Wiki For U.S. Intelligence Community
CortoMaltese noted that the U.S. intelligence community has unveiled their own classified wiki, the Intellipedia. Reuters says "The office of U.S. intelligence czar John Negroponte announced Intellipedia, which allows intelligence analysts and other officials to collaboratively add and edit content on the government's classified Intelink Web much like its more famous namesake on the World Wide Web.
A 'top secret' Intellipedia system, currently available to the 16 agencies that make up the U.S. intelligence community, has grown to more than 28,000 pages and 3,600 registered users since its introduction on April 17. Less restrictive versions exist for 'secret' and 'sensitive but unclassified' material."
For kicks, you can also read about Intellipedia on Wikipedia."
SIPRnet contains a wide variety of resources that people with an access to do not necessarily have "need to know." If you do not have "need to know," it is expected that you will not look for it.
Its a compromise between keeping the information locked in a safe and having humans judge it, then shipping it by federal carrier after judging whether you specifically have "need to know" and expediency of access to that information.
If anything is judged "too sensitive," then it is kept behind either a login or a PKI cert in order to further restrict who would roughly need to know, but you would still be on your honor once on that system not to go riffling through information you have no business knowing.
You have to take into account that this thing is running on the government's ultra classified private network. It is absolutely NOT accessible from ANY Internet based node or router. The network is totally (read: physically) separate from the Internet that you and I use. Only specific secured computers can log in at all.
"I'm a Laver, not a Phyto[plankton]"