Why Post-Quantum Cryptography Doesn’t Replace Classical Cryptography

Kimmo Järvinen, Co-founder and CTO, Xiphera

As quantum computing advances, discussions around the future of cryptography are becoming increasingly common. In many conversations, one message is often heard: in the future, only quantum-safe cryptography will be needed.

While quantum computing does introduce real risks to certain cryptographic systems, the reality is more nuanced. Future secure systems will not solely on a single “quantum-safe” algorithm. Instead, they will continue to combine multiple cryptographic technologies.