DV-MFA Table (Taxonomy of actions)

1--- Structure based on Flow: SURFnet 4.8-9 Registration Desk (Self-service token registration) and Flow: SURFnet 4.4 Mobile Application with Optical Scan + NFC +Selfie, to be combined with Jule's detailed structure below...

V Do the actual vetting

V_CONFIRM_AVAILABILITY The vetting can be rejected if the service desk operator or front or back-end services are not available

V_USE_VETTING_CODE if it was provided within I_ARRANGE_VETTING, the service or operator check the code provided by the applicant

C_CHECK_ELIGIBILITY (optional, requiring C_AUTHN)  DEFINED IN C Even if it was performed during the initiation, the applicant situation may change in the meantime; may depend on prior C_AUTHN or V_PRESENT_PROOF, or the identifuing information provided by the applicant.

V_PRESENT_PROOF applicant presents a proof of identity, typically a sanctioned type of picture ID doc with demographic and biometric data

(V_CREATE_DIGITAL_IDENTITY optional, only if the applicant does not already possess IdP identity (weak or 1st factor identity), done before V_VET_APPLICANT_IDENTITY in order to allow parallelism at the service desk; should be undo-able if V_VET_APPLICANT_IDENTITY fails. Includes creation of the username and the password and check of their alignment with the enforced policies)

C_SELECT_FACTOR defined at C

V_HAND_OVER_FACTOR optional (if the token is provided by the service desk)

V_APPLICANT_IDENTITY detailed check of ID validity and match with the person

V_VET_ PROOF read and inspect the ID doc, compare the user name with the vetting request, check ID security features, optionally electronically read the ID doc, optionally externally check doc validity, compare photo/biometrics match with the person,

V_CHECK_LIVENESS optional, in case online identity vetting, otherwise implied by V_VET_ PROOF conducted with the user

V_RECORD_PROOF_AUDIT_DATA optional, typically by recording the last digits of ID doc number (avoid recording excess personal data, photos of the person or ID doc)

V_USE_TOKEN if HAND_OVER_TOKEN, done by the user in parallel with V_VET_APPLICANT_IDENTITY

V_PASSWORD_AUTHENTICATION like U_PASSWORD_AUTHENTICATION

V_REGISTER_TOKEN like U_INTRODUCE_FACTOR could be standalone even without V_HAND_OVER_TOKEN, but unnecessary with U_INTRODUCE_FACTOR/U_PREREGISTER_TOKEN and V_USE_VETTING_CODE; the used token will be later bound to digital identity

V_RECORD if both V_VET_APPLICANT_IDENTITY and V_USE_TOKEN if HAND_OVER_TOKEN were successful, otherwise reverse V_CREATE_DIGITAL_IDENTITY

B  I would move F_SELECTION DEFINED and F_AUTHENTICATION earlier

2---------------------------

new Structure based on yesterdays discussion:

C Commons

• Authenticate Exiting Factor
• Use Introduced Factor
• Eligibility check

I Initiation/Initiate → what is needed here?

• Request
• Factor selection???
• Code (e.g. QR-Code)
• Appointment

V Vetting/Vet

• Proof
• Liveness
• Source
• Record
  • 2 different records

B Binding/Bind (if Enrollment or Issuance are overloaded by the existing frameworks or often used with different meaning)

• DigitalID
• Activation
• Confirmation

3 -------------------------------

C: Commons

#short description

C_AUTHN_??? Authenticate Existing Factor → TODO: short intuitive label -  C_LOGIN?

#short description

The applicant authenticates with a specific factor. This action may be used for multiple purposes:

This action may be used for the first factor (i.e. 1F_AUTHENTICATE) in order to check first factor knowledge/possession/inheritance/... or as a mean to provide user information (i.e. as a sub action of 2F_REQUEST).

The action may also be used for the second/third/... factor to create an initial binding between digital ID and factor.

This initial binding typically needs to be verified requiring the vetting of the user's identity before it is put into effect.

It may also be used to (cross-) check second/third/... factor knowledge/possession/inheritance/...

Username/password login is typically the first existing factor that is readibly available.

Input:

Output:

C_USE_NEW_FACTOR (one word limit is too harsh) Use Introduced Factor → TODO: short intuitive label

Usage of the introduced factor may serve multiple purposes at different stages.

E.g. Use introduced factor to test functioning, to prove knowledge/possession/inheritance/... or to make sure factors match.

Input:

Output:

C_CHECK_ELIGIBILITY Check Eligibility of Applicant

Check if the applicant is eligible to request an additional factor. For example, if there are some  policy or contractual restrictions. is the applicant associated with participating organisation and eligible for the offered delivery of the additional physical factor such as token.

Done by manual or automated check a directory, federated identity, or examination of s written institutional certificate.

Input: applicant's identifying information

Output: decision: eligible (yes/no)

C_SELECT_FACTOR

The applicant selects the type of the new factor to be introduced, if there are several options. The offered options may depend of the place of the use, for example a wider set of options may be available during initiation than with a particular vetting the user was directed to at the initiation phase.

There may be different factor (types), e.g. something you know/have/are, the applicant can choose from as well as multiple realization options/products per factor (e.g. Yubikey, Google Authenticator) AKA authenticators.

Input: List of possible factors/authenticators

Output: factor selected/assigned and known/(or) in possession/... by the applicant

Input:

Output:

I: Initiation

Optional initial vetting request registration for an additional authentication factor during which the vetting arrangements are made, if needed

• Note: * is used as a wildcard. Set the appropriate value which applies to the specific action.
• 1F: may be used to indicate that a specific action refers to the first factor
• 2F: may be used to indicate that a specific action refers to the second factor

C_AUTHN (optional) DEFINED IN C

In order to request an additional factor the applicant provides user information.

There are multiple options to realize this subactivity, e.g.: using federated login, e-mail, showing up at an registration desk, etc.

Input: user information (e.g. name, affiliation)

Output: factor request

C_CHECK_ELIGIBILITY (optional, requiring C_AUTHN)  DEFINED IN C

C_SELECT_FACTOR DEFINED IN C

Optional, if there are several options for factors that may ve offeret at he start. may affect the options to be used during the vetting phase.

I_REQUEST_FACTOR (I_REQUEST Factor Request)

The applicant must also provide the delivery address and perhaps even pay for the factor, handling and delivery service.

I_FACTOR_DELIVERY

Optional sending of the physical factor (typically a token), if such is used, and if this is a part of the provided service

C_USE_NEW_FACTOR  DEFINED IN C

Optional factor (token) preregistration, if the applicant is expected to possess a token at the time of registration; alternatively, this is done during the vetting.

I_ARRANGE_VETTING

Optional detailing of vetting, if the e-mail, initiation application or other channel is used for to communicate the code, appointment details or other relevant information. Includes several steps such as

• Creation of the (secret) code to be used a the start of vetting to identify the registered vetting request  or while using the factor during during.
• If e-mail is used, get applicant's e-mail address from the IdP account data or from the applicant.
• Optional location selection and/or scheduling of the vetting appointment, only if the load or the policy of the service (desk) require this.
• Provide vetting details over e-mail or through the application, with written or QR code, email validation link, instructions, vetting application link, service desk contacts, address and appointment details, and whatever else is needed.
• Optional e-mail validation, if an e-mail is required for further interaction, and if a valid e-mail address is not already accessible and assured/guaranteed from the IdP data provide upon the previously performed login with the existing factor.

V: Vetting

Capture and verify information about a user for identification.

(Optional) V_SCHEDULE Identification session arrangement and scheduling

Schedule an identification session in order to identify the user.

Optional action. Real-time interaction may not be required.

Input:

Output: identity vetting appointment

Effect on LoA: not applicable

V_PROOF???

Compare the claimed identity (information) which is transmitted by the user or system with user's identity proof (e.g. ID doc, activation code).

Input:

Output: 

Effect on LoA:

V_LIVENESS Perform Liveness Check

In case online identity vetting mechanisms are used (such as video identification, online document upload) a liveness check may be performed to prevent fraud.

Example1: Show ID document besides the head to prove ID document and holder match.

Example2: Upload ID document and real-time recorded selfie.

Input: any mean to show liveness

Output: 

Effect on LoA: ???

(Optional) V_SOURCE

Check user's identity proof (e.g. national ID document, employee ID card) against its original source for validity.

Make sure the identity proof is not expired/revoked/invalid/...

Input: user's identity proof

Output: verified identity proof

Effect on LoA: typically higher LoA require this action

V_RECORD Record Identity Proof

For accountability purposes (parts of) the identity proof (e.g. last 6 digits of national ID document) is recorded.

Input: identity proof

Output: record

Effect on LoA: not applicable

B: Binding

Establishment of a binding between the digital identity of the user and factor

(Optional) F_SELECTION DEFINED AT: F

Selection of a particular factor/authenticator may take place while or after identity vetting.

Besides the selection by the user an assignment of a factor/authenticator e.g. by the registration desk is possible, too.

Input: List of possible factors/authenticators

Output: factor selected/assigned and known/in possession/... by the user

B_DIGITALID Bind factor to digital ID

Create a binding between the introdcued factor and the digital ID of the user based on a verified user identity.

Input: verified user identity, digital ID of user, factor

Output: binding between digital ID and factor

B_ACTIVATE Activate Binding of Digital ID and New Factor

Activate the binding of the digital ID of the user and the new factor.

This action is triggered by the registration authority.

Input: binding between digital ID and factor

Output: decision: activation successful/unsuccessful

B_CONFIRMATION Inform User about Factor Activation

Inform the user about the correct or incorrect activation of the factor.

In case the factor activation was successful the user can now authenticate using more than one factor.

This action is triggered by the registration authority.

Input: result of factor activation (positive/negative)

Output: message to user

------------------------------------------------------ Template for providing example realization options ---------------------------------------------------------------------

could consider more attributes such as:

Likely to be mandatory in MFA: (yes/no)
Risks if omitted: (mostly security-related)
Effect on level of assurance: (how it increases, decreases LoA)
4:13 PM
+
Other potential technical concerns/issues
Potential organisational (IP, NREN, GEANT) concerns/issues
Potential end-user concerns/issues

Example realization options

	2FA token request	2FA token (pre-)registration		Identification				Token binding
	1.1) User provides user info	2.1) User selects 2FA token	2.2) User performs authentication with that token to prove possession	3.1) Eligibility check of user	3.2) Vet identity of user			4.1) User chooses own token or handover of token to user	4.2) Bind token to digital ID	4.3) Token-proof-of-possession	4.4) Token activation & record	4.5)Inform user
					3.2.1) Compare claimed/transmitted/spoken information with user's identity proof	3.2.2) Check user's identity proof with its original source for validity	3.2.3) Record identity proof
Method
Live video	federated login			(checked in 1.1 via login)
...