Quantum computing promises major breakthroughs but poses a serious threat to today’s public key cryptography, as algorithms like Shor’s could break classical encryption in hours. The paper explains how qubits, superposition and rapid advances toward quantum supremacy increase urgency for quantum safe security. Organizations must adopt quantum resistant algorithms, quantum random number generation, quantum key distribution and crypto agile systems to secure data long term. Thales supports this shift with hardware encryption, high entropy key generation and flexible, future ready architectures.

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