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Harvest Now, Decrypt Later: The Threat to Key Exchange – Quantum Series, Part 2

163 · Blogs Cisco · July 13, 2026, 2:30 p.m.
developer Post-Quantum Cryptography post-quantum key exchange Quantum Computing Cryptography Quantum Computing Post-Quantum Cryptography Diffie-Hellman
Summary
This blog post discusses the urgent threat posed by quantum computing to key exchange methods in cryptography, specifically the risks of the 'harvest now, decrypt later' approach, where attackers capture encrypted data now to decrypt later as quantum technologies advance. The post compares classical Diffie-Hellman with post-quantum ML-KEM as potential solutions.
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