Verifiable credentials scheme for education
Terminology
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Glossary
VC — Verifiable Credential, according to vc data model https://www.w3.org/TR/vc-data-model/
credential — A a set of one or more claims made by an issuer. A verifiable credential is a tamper-evident credential that has authorship that can be cryptographically verified. Verifiable credentials can be used to build verifiable presentations, which can also be cryptographically verified. The claims in a credential can be about different subjects.
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claim — all data + metadata (An assertion made about a subject.))
proof — signature by gov't
issuer — id of the issuer organization (URI, DID, JWK or object with ID)
DID(Decentralized Identifier) - a new type of identifier that enables verifiable, decentralized digital identity. A DID refers to any subject (e.g., a person, organization, thing, data model, abstract entity, etc.) as determined by the controller of the DID.
DCC — Digital Credentials Consortium https://digitalcredentials.mit.edu/
Digital Credentials Wallet — Digital wallet for storing verifiable credentials, for example, https://lcw.app/
EBSI — European Blockchain Services Infrastructure. It is a blockchain network of distributed nodes across Europe to support credentials applications. https://ec.europa.eu/digital-building-blocks/wikis/display/EBSI/What+is+ebsi
Useful links
Learn about Verifiable Credentials - https://verifiablecredential.io/learn
W3C Education Task Force : - https://github.com/w3c-ccg/vc-ed/ did 101:
DID documentation - https://w3c-ccgwww.githubw3.ioorg/TR/did-method-v1/core
Verifiable credentials lifecycle
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There are 3 main roles in VC lifecycle: Issuer, Holder and Verifier.
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HTTP API: https://w3c-ccg.github.io/vc-api/#architecture-overview
Verifiable Credentials status
For invalidating credentials after issuing the VC status list concept can be is used
https://w3c-ccg.github.io/vc-status-list-2021/
The support for issuing credentials compliant with VC Status List 2021 was added to sign and verify services in https://github.com/digitalcredentials/sign-and-verify-core/pull/18
DID methods
A DID method defines how implementers can realize the features described by this specification. DID methods are often associated with a particular verifiable data registry. New DID methods are defined in their own specifications to enable interoperability between different implementations of the same DID method. (https://www.w3.org/TR/did-core )
The most popular:
did:web https://w3c-ccg.github.io/did-method-web/#did-method-operations
Bitcoin, Ethereum, etc.
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Testing Tool for DID and VC: https://github.com/transmute-industries/api.did.actor
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VC Extensions
OpenBadges3.0
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OpenBadges3.0 specification: https://imsglobal.github.io/openbadges-specification/ob_v3p0.html
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| Code Block |
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"credentialSubject": {
"id": "did:example:ebfeb1f712ebc6f1c276e12ec21",
"type": ["AchievementSubject"],
"achievement": {}
},
"credentialSchema": [{
"id": "https://imsum2.herokuapp.com/jsonschema?classId=org.1edtech.ob.v3p0.achievementcredential.class",
"type": "JsonSchemaValidator2019"
}] |
EBSI
European Blockchain Services Infrastructure (EBSI) extends VC and adds Verifiable Attestation scheme to VC claim https://ec.europa.eu/digital-building-blocks/wikis/display/EBSIDOC/Data+Models+and+Schemas
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All implements use case Diploma https://ec.europa.eu/digital-building-blocks/wikis/display/EBSIDOC/Diploma+Functional+Scope
Verifiable Credentials wallets
https://info.jff.org/hubfs/Digital Wallet Market Scan/Market-Scan-Digital-Wallet-040122-vF.pdf