{
  "id": "sctcrypto",
  "kind": "datatype",
  "status": "stable",
  "name": "Signed certificate timestamp (SCT)",
  "doc": "Signed certificate timestamp (SCT) of Certificate Transparency (RFC 6962): a log's signed promise to add a certificate to its public Merkle tree within the maximum merge delay. SCTs are embedded in certificates, sent in a TLS extension or stapled to OCSP responses. In data an SCT is usually the Base64 encoding of its binary form. A version 1 SCT starts with a zero byte, so its Base64 starts with A; the regexp also requires the length of a 32-byte log ID, a timestamp and a signature.",
  "is_pii": false,
  "categories": [
    "cryptography"
  ],
  "langs": [
    "common"
  ],
  "classification": "identifier",
  "regexp": "^A[A-P][A-Za-z0-9+/]{140,}={0,2}$",
  "examples": [
    {
      "value": "AETCvQzpFA5kpclKAZMKWqG7NZcOAO4RFoloKhxE17VmAAABoSW/+T4AAAQDAEYwRAIgTeyg6KAfX/46fQ8nvPsns52uWMnjMgcQ5c+pvT4tFBYCIBW4NkWlBKOjfM4SDzLUgf6mSlY1x1HmffO6b1VemlKD",
      "description": "SCT embedded in the certificate of www.rfc-editor.org (October 2026)",
      "valid": true
    },
    {
      "value": "SGVsbG8sIHdvcmxkIQ==",
      "description": "Base64 of the text 'Hello, world!', not an SCT",
      "valid": false
    }
  ],
  "links": [
    {
      "type": "doc",
      "url": "https://www.rfc-editor.org/rfc/rfc6962#section-3.2"
    },
    {
      "type": "wikipedia",
      "url": "https://en.wikipedia.org/wiki/Certificate_Transparency"
    }
  ],
  "quality": {
    "score": 68,
    "missing": [
      "second example",
      "mapping (Wikidata, Schema.org, ...)",
      "translation",
      "detector coverage"
    ]
  },
  "source": {
    "path": "data/datatypes/any/cryptography/sctcrypto.yaml",
    "url": "https://github.com/apicrafter/metacrafter-registry/blob/main/data/datatypes/any/cryptography/sctcrypto.yaml",
    "edit_url": "https://github.com/apicrafter/metacrafter-registry/edit/main/data/datatypes/any/cryptography/sctcrypto.yaml"
  },
  "urls": {
    "html": "http://registry.apicrafter.io/datatype/sctcrypto",
    "json": "http://registry.apicrafter.io/api/v1/datatypes/sctcrypto.json"
  }
}