You are viewing an old version of this page. View the current version.

Compare with Current View Page History

« Previous Version 11 Next »

DRAFT

UC0: SP Requires Silver

The SP requires InCommon Silver LOA.

The SP includes http://id.incommon.org/assurance/silver in the SAML AuthnRequest element. It accepts assertions that contain http://id.incommon.org/assurance/silver in the AuthnContext from IdPs with http://id.incommon.org/assurance/silver in InCommon metadata.

An SP may choose to short-circuit a request to an IdP with no http://id.incommon.org/assurance/silver in InCommon metadata.

Examples:

  • NIH SPs?

UC1: SP Requires Bronze

The SP requires InCommon Bronze LOA (or higher).

The SP includes http://id.incommon.org/assurance/silver and http://id.incommon.org/assurance/bronze in the SAML AuthnRequest element. It accepts either:

Note that IdPs with http://id.incommon.org/assurance/silver in metadata necessarily have http://id.incommon.org/assurance/bronze in metadata, and therefore the IdP can freely choose which qualifier to assert on-the-wire. The SP should be prepared to accept either one.

Examples:

  • The InCommon Federation Manager (FM)
  • The InCommon Certificate Manager (CM)

The FM and the CM recognize Bronze password credentials as the first factor of a two-factor authentication. The InCommon Operations Identity Provider is authoritative for the second "what you have" factor.

UC2: SP Prefers Silver

The SP must operate in a world where not all IdPs can yet provide Silver LOA assertions, and Silver-capable IdPs can't provide Silver assertions for all users/circumstances. In cases where lower LOA assertions are used, the SP restricts access/functionality and/or implements other compensating controls. The SP wants to get Silver assertions whenever possible. The SP can determine which IdPs are Silver-capable from metadata.

For IdPs that are not Silver-capable according to metadata, the SP does not include an IAQ in the SAML AuthnRequest element, and the SP applies compensating controls for the resulting lower LOA.

For IdPs that are Silver-capable according to metadata, the SP includes http://id.incommon.org/assurance/silver and http://id.incommon.org/assurance/bronze and urn:oasis:names:tc:SAML:2.0:ac:classes:unspecified and urn:oasis:names:tc:SAML:2.0:ac:classes:PasswordProtectedTransport in the SAML AuthnRequest element. It accepts at Silver LOA assertions that contain http://id.incommon.org/assurance/silver in the AuthnContext from IdPs with http://id.incommon.org/assurance/silver in their InCommon metadata. The SP applies compensating controls for all other assertions (considered to be lower LOA). The SP handles errors from the IdP (i.e., opensaml::FatalProfileException) by making a new request without a AuthnRequest element, in case the IdP is not able to handle the AuthnRequest element.

Examples:

  • CILogon

UC3: SP Prefers Bronze

...

Examples:

  • Research.Gov
  • No labels