section Security
  description   Message used during the Security procedure.
  message Show-Passport The passport is given for verification
  message Passport-valid The passport is valid and stamped if needed
  message Passport-invalid The passport is not valid
  message Passport-rejected The passport issues could not be resolved
  message Resolve-Passport-issue An attempt is made to resolve the passport problem
  protocol Airport The human airport protocol used in the interaction