Thales has announced a world-first breakthrough in quantum-safe security for 5G networks, demonstrating that existing SIM and eSIM cards already deployed in the field can be remotely upgraded with post-quantum cryptography, without disrupting service or affecting users.
The milestone, achieved in collaboration with a leading mobile operator, proves that telecom networks can strengthen their defenses against future quantum computing threats without replacing physical cards or devices. As quantum computing advances, today’s encryption methods could eventually become vulnerable, placing mobile communications, personal data, and critical infrastructure at risk.
The core innovation lies in “crypto agility,” the ability to update cryptographic algorithms remotely as security standards evolve. Instead of recalling or replacing millions of SIM cards, operators can securely download quantum-resistant algorithms directly onto cards already in circulation. The upgrade occurs seamlessly in the background, preserving connectivity and existing services.
This approach addresses one of the telecom sector’s biggest challenges: scale. With billions of connected devices relying on 5G networks, from smartphones and vehicles to emergency systems and industrial platforms, replacing hardware for every security upgrade is impractical.
The breakthrough builds on Thales’ leadership in post-quantum cryptography, including contributions to global standardization efforts led by the National Institute of Standards and Technology.
According to Eva Rudin, VP of Mobile Connectivity Solutions at Thales, the demonstration shows that quantum-safe security is no longer theoretical. By enabling over-the-air updates, operators can protect long-term investments while preparing networks for the quantum era.
The achievement signals that 5G infrastructure can remain secure, resilient, and adaptable as cyber threats evolve.
