This page captures relevant criteria upon which External ID providers might be assessed, along with group members' comments.  Its purpose was only to structure discussion of the criteria and should not be considered a final product of the work group.

_Should_ *{_}Required vs. Desired vs. Optional{_}* _answers be identified separate from assertions? Note that if so, which answers are Required, etc. will vary based on which solution approach is taken._


|| Desired Reponses from... \\ || Reassign \\ || Pwd Policies \\ || MFA \\ || ID Proof \\ || Attributes \\ || Attr Stability \\ || Release \\ || Consent \\ || Consent Expr \\ || MFA Expr \\ || Directed vs. Static \\ || Mission \\ || Stability \\ || EULA/ Terms \\ || Cost \\ || Audits \\ ||
| Eric Goodman \\ | No reuse/ \\
reassignment ever \\ | Ideally Silver compatible \\ | Ideally \\ | Varies by use case | *Required*: UserID; \\
*Desired*: User knowable UserID; confirmed contact address \\ | Indefinite \\ | Ideally granular \\ | Ideally \\ | SAML Attribute \\ | SAML AuthnContext (and/or attribute?) \\ | Static preferred. In some use cases static is required. \\ | Non-user tracking/privacy preserving is ideal \\ | Always good \\ | ??? \\ | $0 or low \\ | NIST LoA 1 \\ |
| David Walker \\ | Non-reassigned identifier available \\ | Silver / LoA-2, but depends on use case. \\ | Yes, but depends on use case \\ | Depends on use case \\ | Non-reassigned identifier, email \\ | Documented \\ | Documented \\ | Yes \\ | Documented | SAML AuthnContext (and/or attribute?) | Documented \\ | Non-user tracking/privacy preserving is ideal | Always good | Documented \\ | $0 or low | NIST LoA 1 (LoA 2 desired) \\ |
| Mary Dunker \\ | never reassign unique identifier \\ | Comparable to Bronze or Silver - depending on use case \\ | a desirable option \\ | Varies by use case.   Important to publish ID Proofing, if any is done \\ | R&S attributes \\ | Document | Document | yes - required \\ | SAML Attribute \\ | SAML AuthnContext (and/or attribute?) \\
\\ | Document | Non-user tracking/privacy preserving is ideal | Good - Document \\ | Document | $0 | NIST LoA 1  \\ |
| John Breen \\ | No reuse  \\ | Depends on use case. \\
Silver compatible but not necessary if use case does not require. \\ | Support Required \\ | By use case \\ | non-reassigned id \\
e-mail \\
Optional: address, first, last. \\ | Documented \\ | Documented \\ | Case by case. Some attr. no consent (unique id).  \\ | SAML attribute \\ | SAML AuthnContext (and/or attribute?) | Documented \\ | Non-user tracking/privacy preserving is ideal | Good - provable via documentatioin/metrics \\ | Documented \\
Can this conflict with campus privacy policy? \\ | $0 | |
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*Legend*

* *Service*: Name of External ID service provider
* *Account Management Policies*
** *Reassign:* Policies around reassignment of accounts. Specifically, whether the "key identifier") reassigned to different users.
** *Pwd policies:* Overview of password requirements (related to complexity, guessing resistance, etc.)
** *MFA:* Does the vendor offer Multi-Factor support.
* *Account Identity Vetting*
** *ID Proof:* Is there any identity proofing done by the External provider that would allow a campus to trust attributes other than Ext ID-sourced IDs (like "Account Name" and "email")
** *Attributes:* Related to ID Proofing, what attributes are collected and how are they proofed.
** *Attr Stability*: Stability of the External ID and attributes over time
* *AuthN Policies*
** *Release:* Attribute release practices, including
*** What attributes are released?
*** What is the granularity of data release? (Attributes vs. bundles)
** *Consent:* Is there a user consent process before data is released to SPs.
** *Consent Expr*: How does the provider express that user consent was provided for release
** *MFA Expr*: How do they express whether Multifactor has been used?
** *Directed vs. Static*: Does the External ID provider release a directed (per SP) or static (correlatable across SPs) identifier?
* *Company Details*
** *Mission:* Mission of the company, including:
*** Private vs. public
*** Privacy focus
** *Stability*: Stability of the vendor and the service that the vendor offers
*** Likely this is not directly measurable, and would be more along the lines of
*** "how long in business"
*** "how long service has been operational"
*** "how many users using their IDs"
*** etc.
* *Other Concerns*
** *EULA*: Are there terms the External provider applies that are potentially in conflict with general campus policies?
** *Cost*: Is there a cost to the user or the organization to leverage the IDs?
** *Audits*: What 3rd party certifications or audits are available to confirm function of service?