View source for SIPRNet

{{Short description|Computer network used by the United States Government}}
{{Infobox military installation
|operator       = Multiple Operators
|controlledby   = The United States Department of Defense
|partof         = The United States Department of Defense Computer Networks
|country        = Based in United States
|open_to_public = No}}
[[File:USDoS 136760 header.png|thumb|280px|Header of an unclassified Department of State telegram with the "SIPDIS" tag marked in red]]

The '''Secret Internet Protocol Router Network''' ('''SIPRNet''') is "a system of interconnected [[computer network]]s used by the [[United States Department of Defense|U.S. Department of Defense]] and the [[United States Department of State|U.S. Department of State]] to transmit [[Classified information in the United States|classified information]] (up to and including information classified [[Classified information in the United States|SECRET]]) by [[packet switching]] over the 'completely secure' environment".<ref>{{Cite book|title=Us defense information systems agency handbook.|date=2007|publisher=Intl Business Pubns Usa|isbn=978-1-4330-5548-5|location=[Place of publication not identified]|oclc=946756401}}</ref> It also provides services such as [[hypertext]] document access and [[electronic mail]]. 

SIPRNet is a component of the [[Defense Information Systems Network]].<ref>{{cite web|url=https://fas.org/irp/program/disseminate/siprnet.htm|archive-url=https://web.archive.org/web/19970726161029/http://www.fas.org/irp/program/disseminate/siprnet.htm|url-status=dead|archive-date=July 26, 1997|title=Secret Internet Protocol Router Network (SIPRNET)|publisher=Federation of American Scientists' Intelligence Resource Program|access-date=12 December 2010}}</ref> Other components handle communications with other security needs, such as the  [[NIPRNet]], which is used for nonsecure communications, and the [[Joint Worldwide Intelligence Communications System]] (JWICS), which is used for [[Top Secret]] communications.

==Access==
[[File:Intel GreenDoor.jpg|thumb|280px|''Behind the Green Door'' secure communications center with SIPRNET, [[GWAN]], [[NSANET]], and [[Joint Worldwide Intelligence Communications System|JWICS]] access]]
According to the U.S. Department of State Web Development Handbook, domain structure and naming conventions are the same as for the open internet, except for the addition of a [[second-level domain]], like, e.g., "sgov" between state and gov: openforum.state.sgov.gov.<ref>{{Cite web| url=https://fam.state.gov/FAM/05FAH08/05FAH080340.html#H342_2 | title=U.S. Department of State Foreign Affairs Handbook Volume 5 Handbook 8 - Web Development Handbook: 5 FAH-8 H-342.2 ClassNet Standards | access-date=12 Jan 2016 | publisher = U.S. Department of State| date= 29 September 2005}}</ref> Files originating from SIPRNet are marked by a header tag "SIPDIS" (SIPrnet DIStribution).<ref>{{Cite web| url=https://www.bbc.co.uk/news/world-us-canada-11863618 | title=Siprnet: Where the leaked cables came from | access-date=19 December 2010 | publisher = BBC| date= 29 November 2010}}</ref> A corresponding second-level domain smil.mil exists for DoD users.<ref>{{cite web |title=Internet Domain Name Use and Approval|first=John G. |last=Grimes |url=http://www.dtic.mil/whs/directives/corres/pdf/841001p.pdf|archive-url=https://web.archive.org/web/20100821164020/http://www.dtic.mil/whs/directives/corres/pdf/841001p.pdf|url-status=dead|archive-date=August 21, 2010|publisher=Department of Defense|date=14 April 2008}}</ref>

Access is also available to a "...small pool of trusted allies, including Australia, Canada, the United Kingdom and New Zealand...".<ref>{{cite news |title=NZ way down the WikiLeaks queue |first=Michael |last=Field |url=http://www.stuff.co.nz/national/4415037/NZ-way-down-the-WikiLeaks-queue |publisher=[[Fairfax New Zealand]] |date=2 December 2010 |access-date=17 December 2010}}</ref> This group (including the US) is known as the [[Five Eyes]].

SIPRNet was one of the networks accessed by [[Chelsea Manning]], convicted of leaking the video used in [[WikiLeaks]]' "[[Collateral Murder]]" release<ref name=wired>{{Cite news| url=https://www.wired.com/threatlevel/2010/06/leak/ | first1=Kevin | last1=Poulsen | first2=Kim | last2=Zetter | title=U.S. Intelligence Analyst Arrested in Wikileaks Video Probe | newspaper=[[Wired (magazine)|Wired]] |date=6 June 2010 |access-date=15 June 2010}}</ref> as well as the source of the [[United States diplomatic cables leak|US diplomatic cables]] published by WikiLeaks in November 2010.<ref>{{Cite news |author= Leigh, David |title= US embassy cables leak sparks global diplomacy crisis |url= https://www.theguardian.com/world/2010/nov/28/us-embassy-cable-leak-diplomacy-crisis |work= [[The Guardian]] |date= 28 November 2010 |access-date= 28 November 2010}}</ref>

==Alternate names==
SIPRNet and [[NIPRNet]] are referred to [[colloquialism|colloquially]] as ''SIPPERnet'' and ''NIPPERnet'' (or simply ''sipper'' and ''nipper''), respectively.<ref>{{cite web |title=Definition of NIPRNet |url=https://www.pcmag.com/encyclopedia/term/niprnet |website=PCMag |access-date=18 August 2021 |date=n.d.}}</ref><ref>{{cite book |author1=Harold F. Tipton |author2=Micki Krause Nozaki |title=Information Security Management Handbook, Volume 4 |date=2010 |publisher=CRC Press |isbn=9781439819036 |page=67 |edition=6th |url=https://books.google.com/books?id=jDHNBQAAQBAJ&pg=PA67}}</ref>

==See also==
* [[CAVNET]]
* [[Classified website]]
* [[NIPRNet]]
* [[RIPR]]
* [[Intellipedia]]
* [[Protective distribution system]]
* [[NATO CRONOS]]

==References==
{{Reflist}}

==External links==
* [http://www.disa.mil/services/data.html DISA] {{Webarchive|url=https://web.archive.org/web/20110723191643/http://www.disa.mil/services/data.html |date=2011-07-23 }}
* [https://fas.org/irp/program/disseminate/siprnet.htm Secret Internet Protocol Router Network (SIPRNET)] {{Webarchive|url=https://web.archive.org/web/19970726161029/http://www.fas.org/irp/program/disseminate/siprnet.htm |date=1997-07-26 }} by the Federation of American Scientists' Intelligence Resource Program
* [https://web.archive.org/web/20090625115648/http://www.admissions.uscga.edu/i2e/news/news_details.asp?CID=367 They've Got Learning Locked Down] – article detailing U.S. Coast Guard Academy classroom being first to get access to SIPRNet
* [https://www.bbc.co.uk/news/world-us-canada-11863618 BBC Article on SIPRNet]

{{DEFAULTSORT:Siprnet}}
[[Category:Wide area networks]]
[[Category:Cryptography]]
[[Category:United States government secrecy]]
[[Category:Military communications of the United States]]