PKD – Procedural and Technical Information
The PKD Interface Specifications are provided to prospective PKD Participants after submission of their Notice of Participation to the ICAO Secretariat and payment of the Registration Fee.
Some technical information such as generic Interface Specifications may be made available to prospective PKD Participants upon request.
Procedural documents relating to the operation of the ICAO PKD, including the
Regulations for the ICAO Public Key Directory and the
Procedures for the ICAO Public Key Directory are available for download at
The management of these various technical documents, including considering and approving amendments to them, is the responsibility of the PKD Board.