Thales has collaborated with a top tier mobile operator to demonstrate that existing 5G SIM / eSIM cards already deployed in the field can be securely upgraded to quantum-safe protection, without disrupting service or impacting the customer experience.

According to Thales, this Post-Quantum Cryptographic (PQC) breakthrough proves that mobile networks can evolve their security through crypto agility to address quantum cyber threats.

Quantum computing has the potential to break today’s encryption methods in the future, putting mobile communications, personal data and critical infrastructure at risk.

The challenge is scale. Replacing millions of devices every time security standards evolve is neither practical nor sustainable. The industry needs a new approach.

With this demonstration, Thales shows that security can be upgraded remotely and instantly, directly on SIM and eSIM cards already in use. This capability, known as crypto agility, allows operators to adapt their security protections as threats and standards evolve, without waiting for new product generations.

The new technique remotely downloads post-quantum cryptographic algorithms directly SIM and eSIM cards in the background, preserving existing data and services while instantly enhancing security. With Thales’ crypto-agile approach, operators can remotely update the device protection without replacing cards, changing devices or interrupting connectivity.

“This successful test shows that quantum-safe security is no longer a future concept, it’s something networks can start preparing for today,” said Eva Rudin, VP Mobile Connectivity solutions at Thales. “By enabling remote upgrades, we help operators protect their customers and critical services without disruption. We will continue working together to help bring quantum-ready security to commercial and private 5G networks worldwide, ensuring trust, resilience and continuity in a rapidly changing digital world.”