International Civil Aviation Organization Public Key Directory

The International Civil Aviation Organization Public Key Directory (ICAO PKD) is a database maintained by the International Civil Aviation Organization holding national cryptographic keys related to the authentication of e-passport information.

The ICAO PKD content is open to the public, and can be downloaded for free at https://download.pkd.icao.int/.

Participants
The United Nations became the first non-state participant in October 2012, enabling issuing of e-UNLP, the electronic form of the United Nations laissez-passer.

In December 2014, ICAO reported the PKD as having 45 participants.

In 2015 the German Bundesdruckerei (German Federal Printing Office) won the request for tender of the ICAO to provide the ICAO PKD.

In July 2017, ICAO reported the PKD as having 58 participants.

As of November 2017, 60 participants were part of the ICAO PKD, with the European Union being the 60th member and at the same time the second non-state participant.

As of March 2024, 95 participants were part of the ICAO PKD.

Participation Fees
Each ICAO PKD participant needs to pay a one-time registration fee and annual fees. The registration fee was USD 56,000 at first, and was reduced to USD 15,900 since March 2015. The annual fee comprises two components: the ICAO portion and the PKD Operator portion. Every participant pays the same amount of annual fees.