What is quantum-safe encryption?
Securing data in the quantum era
Quantum computers threaten current key-exchange mechanisms such as Diffie-Hellman and RSA. With sufficient qubits, a quantum system could derive secret keys in minutes, exposing sensitive data. However, when quantum-safe schemes such as ML-KEM are used, even a powerful quantum computer gains no meaningful advantage. These algorithms fall under post-quantum cryptography (PQC). An alternative to PQC is quantum key distribution (QKD) – a method that relies on the laws of physics, not math, to secure keys.
Harvest now, decrypt later
Although quantum computers are still in development, ‘harvest now, decrypt later’ attacks already threaten data intended to stay private for decades to come.
Post-quantum cryptography is a technology-ready solution that future-proofs networks with secure data transmission and storage.
The two layers of quantum-safe encryption
Achieving quantum-safe data transfer requires both a key exchange protocol and a symmetric cipher that resist quantum attacks.
Methods of quantum-safe encryption
Secure quantum-safe communication has two parts: a quantum-safe key exchange protocol and a symmetric encryption algorithm that withstands quantum threats. AES, one of the best-known symmetric ciphers, is considered quantum-resistant with appropriately long key sizes. Both post-quantum cryptography (PQC) algorithms and quantum key distribution (QKD) can be used for key exchange. Hybrid approaches that leverage both PQC and QKD combine mathematical and physical defenses, increasing security while maintaining real-world performance.
Why quantum-safe encryption matters
Quantum-safe encryption protects data against future quantum-enabled attacks while strengthening defenses against today’s threats to data-in-motion.
Future-proof network security
Our portfolio of quantum-safe data transport solutions protects against data-harvesting attacks and integrates seamlessly into existing optical and packet networks. Supporting both PQC and QKD, as well as hybrid approaches, we offer a flexible path to quantum resilience. By enabling robust encryption without disrupting existing infrastructure, Adva Network Security helps operators safeguard data in motion, today and into the quantum future.
;