{
  "title": "FutoIn 'sec' field - Simple MAC",
  "type": "object",
  "additionalProperties": false,
  "required": [
    "user",
    "algo",
    "sig"
  ],
  "properties": {
    "user": {
      "type": "string",
      "description": "Unique user identification"
    },
    "algo": {
      "type": "string",
      "description": "MAC algo name as defined in FTN8"
    },
    "sig": {
      "type": "string",
      "description": "Base64 encoded MAC"
    }
  }
}