The International Civil Aviation Organization (ICAO) launched the next-generation Public Key Directory (PKD) system for cross-border journeys on March 27.
The ICAO PKD is a secure international database that helps border authorities, airlines and other trusted parties confirm whether electronic passports and digital travel documents are genuine. It provides a central place for countries to share digital security certificates – known as ‘public keys’ – used to check that a travel document matches what was issued by a government.
When a traveler presents an electronic passport or digital ID, officials use the PKD to verify its digital signature, confirming both the authenticity of the document and that its information has not been altered. The PKD does not contain personal information about individuals or the contents of their documents.
The system is designed to help each country meet its own legal obligations to process passengers promptly and respectfully while enabling industry players to support a holistic and seamless travel process. Airports and airlines will be able to offer remote document authentication via smartphones and to access verified biometrics in advance.
For those passengers who opt-in, this will streamline boarding, immigration and even commercial services, such as shopping. “These enhancements will allow airports, airlines and technology providers to better support state authorities as innovation partners,” ICAO said on March 26.
The new system will also support the verification of the authenticity of a wider range of travel documents, such as health certificates, digital visas and new electronic IDs. “Its new real-time dashboards will give organizations greater confidence in their own data,” ICAO said. “A more flexible system architecture will also allow states to respond rapidly to future needs by adding new types of digital credentials as air travel evolves.”
ICAO explained that since its last update in 2015, the PKD has grown to include 107 of its 193 member states. “With the system playing a central role in ICAO’s broader strategy to improve the accessibility of air transport, ICAO is advocating for all member states to join and fully use the PKD and is providing capacity-building support to ensure they are able to do so,” the organization said.
In addition to the immediate implementation for member states as the core users, ICAO also plans to use the months following the launch as a demonstration phase for other private sector stakeholders. This will enable interested organizations to explore the PKD system’s new capabilities. A broader program for private sector use is scheduled to roll out in September 2026.
Related news, Sun Group and CAI partner to develop Phu Quoc Airport as regional hub
