SD-JWT

• JWT for Selective Disclosure.
• Flow:
  • Issuer passes two objects to the holder:
    • SD-JWT (signed JWT, contains CLAIMs, HASHES OF VALUES, and a signature)
    • SD-JWT-SVC (Salt Value Container, contains CLAIMs, SALTS, and JSON-Encoded VALUES)
  • Holder
    • creates SD-JWT-R (unsigned subset of the SD-JWT-SVC) i.e. holder can see the values of the claims that are released.
    • passes SD-JWT and SD-JWT-R to the verifier
  • Verifier
    • Uses salts to verify hashes
    • Can then trust the SD-JWT
• Extensions allow for "holder binding" to eliminate replay attacks.
• Pros:
  • User sees values that are passed on
  • User is in charge of the selection of claims
• Cons:
  • Breaks existing JWT flows

ELM-V3

• European Learning Model https://htmlpreview.github.io/?https://github.com/european-commission-empl/European-Learning-Model/blob/master/rdf/ap/edc/documentation/EDC-generic-no-cv.html#evidence
• Extensive (extremely overly complicated) model to define all kinds of learning
• Based on
  • JSON-LD
  • Verifiable Credentials: https://www.w3.org/2018/credentials/