Commercial Internet Protocol Security Option

{{Short description|Computer networking protocol for secret information}}

The Commercial Internet Protocol Security Option (CIPSO) is a mechanism for attaching security labels to Internet Protocol traffic. It was supported by an IETF working group in coordination with the Trusted Systems Interoperability Group.{{Cite web |title=Commercial Internet Protocol Security Option (cipso) |url=https://datatracker.ietf.org/wg/cipso/about/ |access-date=2025-04-02 |website=datatracker.ietf.org}} CIPSO was used by Solaris Trusted Extensions.{{Cite web |title=Solaris Operating System Data Sheet Solaris Trusted Extensions |url=https://www.oracle.com/solaris/technologies/trusted-extensions-jsp.html |archive-url=http://web.archive.org/web/20240810101946/https://www.oracle.com/solaris/technologies/trusted-extensions-jsp.html |archive-date=2024-08-10 |access-date=2025-04-02 |website=www.oracle.com |language=en-US}}

It has been replaced by the U.S. DoD Security Options for the Internet Protocol, defined in {{IETF RFC|1108}}.{{Cite report |url=https://datatracker.ietf.org/doc/html/rfc1108 |title=U.S. Department of Defense Security Options for the Internet Protocol |date=November 1991 |publisher=Internet Engineering Task Force |issue=RFC 1108}}