The International Civil Aviation Organization has put its next-generation Public Key Directory into production, replacing an older trust layer with infrastructure meant to verify electronic passports and newer digital travel credentials at scale. ICAO said the upgraded PKD went live at 9 a.m. Eastern this morning and is now available to border authorities, airlines and other approved relying parties to confirm that a document’s chip data and digital signatures are genuine.
PKD works by distributing the public key certificates that countries use to sign travel documents, allowing inspectors and connected systems to check whether a passport or credential was issued by the claimed authority and whether its contents were altered. ICAO said the directory stores no personal data. The new platform is designed to support not only traditional e-passport inspection, but also broader digital-credential use cases such as remote document authentication on smartphones, advance verified biometrics for opt-in passengers, digital visas and other electronic IDs.
The launch extends a modernization push that has been building across the travel stack. Earlier this year ICAO and Amadeus signed an MoU covering digital identity and biometrics for air travel modernization, while vendors such as Indicio have been moving passport-derived credentials into chat-based verification tools. Airports are also expanding live deployments, including 78 biometric eGates to speed immigration processing in Manila.
ICAO said 107 of its 193 member states are already participating in the PKD. That installed base matters because e-passports only become easier to trust across borders when countries and service providers can validate signatures against a shared, current directory rather than maintain fragmented bilateral checks or stale certificate stores. It is particularly useful for issuers and operators that need a common validation backbone instead of maintaining bespoke certificate relationships.
The next phase is aimed at broader operational access. ICAO said a private-sector demonstration phase begins after the March launch, with a larger private-sector program planned for September 2026. That should widen the group of organizations able to validate travel credentials earlier in the passenger journey, from online check-in to border processing.
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By Cass Kennedy
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