{
  "package" : "hl7.terminology.r4@6.3.0",
  "definition" : "Security metadata observation value used to indicate the mechanism by which software systems can establish that data was not modified in transit.\\r\\n\\r\\n*Rationale:* This definition is intended to align with the ISO 22600-2 3.3.19 definition of cryptographic checkvalue: Information which is derived by performing a cryptographic transformation (see cryptography) on the data unit. The derivation of the checkvalue may be performed in one or more steps and is a result of a mathematical function of the key and a data unit. It is usually used to check the integrity of a data unit.\\r\\n\\r\\n**Examples:** \\r\\n\\r\\n *  SHA-1\\r\\n *  SHA-2 (Secure Hash Algorithm)",
  "system" : "http://terminology.hl7.org/CodeSystem/v3-ObservationValue",
  "property" : [ {
    "code" : "status",
    "valueCode" : "active"
  }, {
    "code" : "internalId",
    "valueCode" : "23495"
  }, {
    "_uri" : "http://hl7.org/fhir/concept-properties#parent",
    "code" : "parent",
    "_implicit" : true,
    "valueCode" : "_SECDATINTOBV"
  } ],
  "codesystem" : "730c6680-1192-583b-885c-ffeb9abd3fa3",
  "concept_id" : "397d31bf-2075-512f-a972-b76cbde7ab2a",
  "ancestors" : {
    "CRYTOHASH" : 0,
    "_SECINTOBV" : 2,
    "_SECDATINTOBV" : 1,
    "_SecurityObservationValue" : 3
  },
  "id" : "b2da112a-b1e4-4e3f-baa6-97100243995f",
  "code" : "CRYTOHASH",
  "display" : "cryptographic hash function",
  "version" : "4.0.0"
}