DID-VC

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Verifiable Credential

可验证数据只是使用加密算法进行数字签名的数据。Verifiable Credential 可验证凭证，可以代表物理凭证所代表的所有相同信息。

它具有发行者、主题、证明和可验证数据等属性。

目前W3C的示例：

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{
  "@context": [
    "https://www.w3.org/2018/credentials/v1",
    "https://www.w3.org/2018/credentials/examples/v1"
  ],
  "id": "http://example.edu/credentials/1872",
  "type": ["VerifiableCredential", "AlumniCredential"],
  "issuer": "https://example.edu/issuers/565049",
  "issuanceDate": "2010-01-01T19:23:24Z",
  "credentialSubject": {
    "id": "did:example:ebfeb1f712ebc6f1c276e12ec21",
    "alumniOf": {
      "id": "did:example:c276e12ec21ebfeb1f712ebc6f1",
      "name": [{
        "value": "Example University",
        "lang": "en"
      }, {
        "value": "Exemple d'Université",
        "lang": "fr"
      }]
    }
  },

  "proof": {
    "type": "RsaSignature2018",
    "created": "2017-06-18T21:19:10Z",
    "proofPurpose": "assertionMethod",
    "verificationMethod": "https://example.edu/issuers/565049#key-1",
    "jws": "eyJhbGciOiJSUzI1NiIsImI2NCI6ZmFsc2UsImNyaXQiOlsiYjY0Il19..TCYt5X
      sITJX1CxPCT8yAV-TVkIEq_PbChOMqsLfRoPsnsgw5WEuts01mq-pQy7UJiN5mgRxD-WUc
      X16dUEMGlv50aqzpqh4Qktb3rk-BuQy72IFLOqV0G_zS245-kronKb78cPN25DGlcTwLtj
      PAYuNzVBAh4vGHSrQyHUdBBPM"
  }
}

Decentralized Identifier

DID 的风格或更准确地说是 DID 方法定义了如何执行该 DID 方法的 DID 的 CRUD 操作。 每个 DID 方法在特定用例中都有不同的权衡。 例如，可以在没有区块链的情况下创建 Web DID，但存在依赖于区块链的 DID 方法。 它们都是有效的 DID，但有不同的保证。

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// https://veramo.dev/.well-known/did.json
{
  "@context": "https://w3id.org/did/v1",
  "id": "did:web:veramo.dev",
  "publicKey": [
    {
      "id": "did:web:veramo.dev#0405aa19bb98a5fd29c15a730cb5064ca128dea19247b896b1a7bdad0b4bccccda9b47366cd1359e740d938e5a47d7bed0501150e8a1623805ac47c489421b1506",
      "type": "Secp256k1VerificationKey2018",
      "controller": "did:web:veramo.dev",
      "publicKeyHex": "0405aa19bb98a5fd29c15a730cb5064ca128dea19247b896b1a7bdad0b4bccccda9b47366cd1359e740d938e5a47d7bed0501150e8a1623805ac47c489421b1506"
    }
  ],
  "authentication": [
    {
      "type": "Secp256k1SignatureAuthentication2018",
      "publicKey": "did:web:veramo.dev#0405aa19bb98a5fd29c15a730cb5064ca128dea19247b896b1a7bdad0b4bccccda9b47366cd1359e740d938e5a47d7bed0501150e8a1623805ac47c489421b1506"
    }
  ],
  "service": [
    {
      "id": "did:web:veramo.dev#msg",
      "type": "Messaging",
      "serviceEndpoint": "https://veramo.dev/messaging",
      "description": "Handles incoming POST messages"
    }
  ]
}