Consider the following pairs regarding the Digi Yatra digital identity framework and related global/domestic standards:

Pairs

1. IATA One ID — Global framework for interoperable, seamless travel identity verification across airlines and airports
2. ICAO Public Key Directory (PKD) — International repository that enables verification of the authenticity of e-passport chips issued by member states
3. Digi Yatra wallet — A centralised government server that stores passengers' biometric credentials and shares them with airport authorities