Why Google Is Betting on Post-Quantum Cryptography Instead of Quantum Key Distribution

The article explains that Google sees post-quantum cryptography as the only practical path to a quantum-safe internet. PQC algorithms can be deployed today using existing infrastructure, allowing upgrades to encryption, signatures, and key exchange without special hardware. QKD, in contrast, requires dedicated quantum-communication equipment, is expensive, and cannot scale to global networks. Google emphasizes crypto-agility and phased PQC adoption to protect against future “store now, decrypt later” threats, arguing that broad, internet-wide security must rely on solutions that are both robust and deployable at scale. 

https://bughunters.google.com/blog/4625466008862720/google-s-commitment-to-a-quantum-safe-future-why-pqc-is-google-s-path-forward-and-not-qkd

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