@mattrglobal/jsonld-signatures-bbs
Advanced tools
A JSON-LD linked data proof suite for creating and verifying BBS+ signatures and proofs
The following repository contains the specification and a reference implementation for generating linked data signatures using the BBS+ Signature Algorithm using BLS12-381 key pairs.
Due to the properties of a BBS+ Signatures a zero knowledge proof can be derived from the signature, whereby the party generating the proof can elect to selectively disclose statements from the originally signed payload.
To install
yarn install --frozen-lockfile
To run the tests
yarn test
The following is an example of a signed JSON-LD document featuring a BBS+ linked data signature.
{
"@context": [
"https://www.w3.org/2018/credentials/v1",
"https://w3id.org/citizenship/v1"
],
"type": ["VerifiableCredential", "PermanentResidentCard"],
"issuer": "did:example:28394728934792387",
"issuanceDate": "2019-12-03T12:19:52Z",
"expirationDate": "2029-12-03T12:19:52Z",
"credentialSubject": {
"type": ["PermanentResident", "Person"],
"givenName": "JOHN",
"familyName": "SMITH",
"gender": "Male",
"image": "data:image/png;base64,iVBORw0KGgo...kJggg==",
"residentSince": "2015-01-01",
"lprCategory": "C09",
"lprNumber": "999-999-999",
"commuterClassification": "C1",
"birthCountry": "Bahamas",
"birthDate": "1958-07-17"
},
"proof": {
"type": "BBSSignature2020",
"signature": "eyJhbGciOiJFZERTQSIsI...wRG2fNmAx60Vi4Ag",
"requiredRevealStatements": [ 1, 2, 3, 4, 10],
"proofPurpose": "assertionMethod",
"verificationMethod": "did:example:28394728934792387#keys-7f83he7s8",
"subjectVerificationMethod": "did:example13920596349402396#keys-5920692"
}
}
Whereby the subject is able to generate a zero knowledge proof, from the signed JSON-LD document of the form.
{
"@context": [
"https://www.w3.org/2018/credentials/v1",
"https://w3id.org/citizenship/v1"
],
"type": ["VerifiableCredential", "PermanentResidentCard"],
"issuer": "did:example:28394728934792387",
"issuanceDate": "2019-12-03T12:19:52Z",
"expirationDate": "2029-12-03T12:19:52Z",
"credentialSubject": {
"type": ["PermanentResident", "Person"],
"givenName": "JOHN",
"familyName": "SMITH",
"commuterClassification": "C1",
"birthCountry": "Bahamas",
"birthDate": "1958-07-17"
},
"proof": {
"type": "BBSSignatureProof2020",
"proof": "eyJhbGciOiJFZERTQSIsI...wRG2fNmAx60Vi4Ag",
"domain": "did:example:relying-party",
"subjectDomainProof": "eigqeivIenvIEiHtiW...6ChjkeIchjs"
"requiredRevealStatements": [ 1, 2, 3, 4, 10],
"revealedAttributes": [ 1, 2, 3, 4, 5 ],
"totalAttributes": 10,
"proofPurpose": "assertionMethod",
"verificationMethod": "did:example:28394728934792387#keys-7f83he7s8"
}
}
FAQs
A JSON-LD linked data proof suite for creating and verifying BBS+ signatures and proofs
The npm package @mattrglobal/jsonld-signatures-bbs receives a total of 0 weekly downloads. As such, @mattrglobal/jsonld-signatures-bbs popularity was classified as not popular.
We found that @mattrglobal/jsonld-signatures-bbs demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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