History of SAML
The OASIS Security Services Technical Committee (SSTC), which met for the first time in January 2001, was chartered "to define an XML framework for exchanging authentication and authorization information." To this end, the following intellectual property was contributed to the SSTC during the first two months of that year:
- Security Services Markup Language (S2ML) from Netegrity
- AuthXML from Securant
- XML Trust Assertion Service Specification (X-TASS) from VeriSign
- Information Technology Markup Language (ITML) from Jamcracker
Building on this work, in November 2002 OASIS announced the Security Assertion Markup Language (SAML) V1.0 specification as an OASIS Standard.
Meanwhile, the Liberty Alliance, a large consortium of companies and non-profit and government organizations, proposed an extension to the SAML standard called the Liberty Identity Federation Framework (ID-FF). Like its SAML predecessor, Liberty ID-FF proposed a standardized, cross-domain, web-based, single sign-on framework. In addition, Liberty described a circle of trust, where each participating domain is trusted to accurately document the processes used to identify a user, the type of authentication system used, and any policies associated with the resulting authentication credentials. Other members of the circle of trust may examine these policies to determine whether to trust such information.
While Liberty was developing ID-FF, the SSTC began work on a minor upgrade to the SAML standard. The resulting SAML V1.1 specification, ratified by the SSTC in September 2003, is widely implemented and deployed today. Then, in the same month, Liberty contributed ID-FF to OASIS, thereby sowing the seeds for the next major version of SAML. Thus in March 2005, SAML V2.0 was announced as an OASIS Standard. SAML V2.0 represents the convergence of Liberty ID-FF and other proprietary extensions, as well as early versions of SAML itself. Implementations and deployments of SAML V2.0 are in progress as of this writing (March-2007).
Read more about this topic: Security Assertion Markup Language
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