Looking at the i-names SSO (ISSO) spec being defined at XDI.org, they account for some minimum password strengths by which users MUST authenticate to their i-Broker (within the XDI.org community)
To help prevent dictionary attacks, XDI.ORG MUST specify a minimum password strength required of all ISSO accounts in the XDI.ORG network.
As they use SAML 2.0 as the protocol by which the Website requests an authentication and by which the i-Broker responds, it seems strange that they don't refer to SAML 2.0's Authentication Context as the mechanism for defining such minimum authentication requirements.
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