GSMA-Post-Quantum-Cryptography-for-5G-Roaming-2026.md

Executive Summary: This GSMA non-confidential guidance (PQ.07) examines the implications of adopting post-quantum cryptography in non-terrestrial networks (NTNs), detailing NTN use-cases (satellite-to-ground, backhaul, direct-to-phone, IoT), a cryptographic inventory, migration strategies (including hybrid approaches), stakeholder roles, PKI considerations, legacy impacts, standards and vendor dependencies, and performance mitigation measures to enable interoperable, quantum-resistant deployments.