International Civil Aviation Organization Public Key Directory

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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.

A September 2011 United States Central Intelligence Agency document released by WikiLeaks in December 2014 explains the purpose and scope of the system:

Although falsified e-passports will not have the correct digital signature, inspectors may not detect the fraud if the passports are from countries that do not participate in the International Civil Aviation Organization’s Public Key Directory (ICAO PKD). Only 15 of over 60 e-passport-issuing countries belong to the PKD program, as of December 2010.

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.[2]

In December 2014, ICAO reported the PKD as having 45 participants.[3]

In 2015 the German Bundesdruckerei (German Federal Printing Office) won the request for tender of the ICAO to provide the ICAO PKD.[4]

In July 2017, ICAO reported the PKD as having 58 participants.[3]

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.[3]

See also[edit]


  1. ^ Central Intelligence Agency (September 2011). "Surviving Secondary: An Identity Threat Assessment of Secondary Screening Procedures at International Airports" (PDF). WikiLeaks.
  2. ^ "UN Imports PKD Country Signing Certificate". International Civil Aviation Organization. October 2012.
  3. ^ a b c "ICAO PKD Participants". International Civil Aviation Organization. Retrieved 2018-11-20.
  4. ^ "Bundesdruckerei macht das Reisen weltweit sicherer". Bundesdruckerei GmbH. July 2015. Archived from the original on 2020-06-15. Retrieved 2015-07-03.

External links[edit]