{
  "fileFormatID": 1469,
  "formatName": "PKCS #7 Cryptographic Message File",
  "version": null,
  "formatDescription": "PKCS #7 Cryptographic Message File is a form of electronic signature used to secure messages that can only be read by the intended recipient. PKCS #7 describes a general syntax for data that may have cryptography applied to it, such as digital signatures and digital envelopes. PKCS #7 is one of the family of standards called Public-Key Cryptography Standards (PKCS) devised and published by RSA Security Inc, starting in the early 1990s; storing signed and/or encrypted data, usually attached to an email message that includes an S/MIME (Secure/Multipurpose Internet Mail Extensions) digital signature. The extension .p7s usually refers to PKCS #7 Signature Files; .p7m usually refers to PKCS #7 MIME Files; and .p7b usually refers to PKCS #7 Certificate Files. The research of this format is still ongoing, please contact the PRONOM team if you how any more information regarding this format.",
  "releaseDate": null,
  "binaryFileFormat": null,
  "formatNote": "https://en.wikipedia.org/wiki/PKCS_7\r\n\r\nhttps://en.wikipedia.org/wiki/PKCS\r\n\r\nhttps://en.wikipedia.org/wiki/S/MIME\r\n\r\nhttps://www.cryptomathic.com/news-events/blog/introduction-to-digital-signatures-and-pkcs-7\r\n\r\nhttps://comodosslstore.com/resources/what-is-an-smime-p7s-file-attachment-and-how-do-i-open-it/",
  "lastUpdatedDate": "16 Nov 2023",
  "formatProvenance": "11/2023 (v.116)- Priority over fmt/101 added. Internally researched.",
  "formatSourceDate": "23 Sep 2014",
  "formatDisclosure": null,
  "formatEnvironment": null,
  "formatRisk": null,
  "formatAliases": null,
  "formatTypes": "Text (Structured)",
  "formatFamilies": null,
  "identifiers": [
    {
      "identifierText": "application/pkcs7-mime",
      "identifierType": "MIME"
    },
    {
      "identifierText": "application/pkcs7-signature",
      "identifierType": "MIME"
    },
    {
      "identifierText": "fmt/670",
      "identifierType": "PUID"
    }
  ],
  "internalSignatures": [
    {
      "signatureID": 1003,
      "name": "PKCS #7 Cryptographic Message File",
      "note": "The signature is seeking the first byte of 0x30, then the presence of the OID (Object Identifier) 1 2 840 113549 1 7 in ASN.1 (Abstract Syntax Notation) using BER (Basic encoding rules) encoding.",
      "byteSequences": [
        {
          "positionType": "Absolute from BOF",
          "offset": 0,
          "maxOffset": 0,
          "byteSequence": "30{1-5}06092A864886F7",
          "endianness": null,
          "byteSequenceID": 1227
        }
      ],
      "provenance": "PKCS #7 rfc (page 28 describes the OID): http://tools.ietf.org/html/rfc2315\nASN.1 notation: http://en.wikipedia.org/wiki/Abstract_Syntax_Notation_One\nBER encoding: http://luca.ntop.org/Teaching/Appunti/asn1.html"
    }
  ],
  "externalSignatures": [
    {
      "externalSignature": "p7m",
      "signatureType": "File extension"
    },
    {
      "externalSignature": "p7b",
      "signatureType": "File extension"
    },
    {
      "externalSignature": "p7s",
      "signatureType": "File extension"
    }
  ],
  "relationships": [
    {
      "relationshipType": "Has lower priority than",
      "relatedFormatID": 2061,
      "relatedFormatName": "ZFO (Message) File",
      "relatedFormatPUID": "fmt/1243"
    },
    {
      "relationshipType": "Has lower priority than",
      "relatedFormatID": 2062,
      "relatedFormatName": "ZFO (Sent Message) File",
      "relatedFormatPUID": "fmt/1244"
    },
    {
      "relationshipType": "Has lower priority than",
      "relatedFormatID": 2063,
      "relatedFormatName": "ZFO (Proof of Delivery) File",
      "relatedFormatPUID": "fmt/1245"
    },
    {
      "relationshipType": "Has priority over",
      "relatedFormatID": 638,
      "relatedFormatName": "Extensible Markup Language",
      "relatedFormatPUID": "fmt/101"
    }
  ],
  "submittedBy": [
    1
  ]
}