How to Participate


​​In order to participate in the ICAO Public Key Directory (PKD), States are required to follow the procedure outlined below:


  1. Complete and send the  Notice of Participation (Attac​hment A​  of the ICAO PKD MoU) to the Secretary General of ICAO . This Notice should also be sent via email to; 

  2. Make arrangements with the ICAO Secretariat to pay the PKD registration fee as established in Attachment B of the ICAO PKD MoU;

  3. Once payment is credited to ICAO's account, your State will receive the required documentation for establishing technical connections to the PKD, performing the required tests and fully participating in the PKD.   

The signed original Notice of Participation should be sent to the following address:


Secretary General

International Civil Aviation Organization

999 Robert-Bourassa Boulevard

Montréal, Québec


H3C 5H7 

See the following diagram for more information on first steps and application of fees for new participants.

Joining ICAO PKD.jpg


For more information, please contact ICAO-PKD@ICAO.INT


Share this page: