Quantum-Resistant Encryption on GCP: Kyber, Dilithium & Key Rotation

Securing inter-region data in transit on Google Cloud with post-quantum algorithms like Kyber and Dilithium is fast becoming a senior interview topic — here's how to design it properly.

You'll learn:

• Why NIST-selected algorithms Kyber (key encapsulation) and Dilithium (digital signatures) are the go-to choices for post-quantum TLS on GCP
• How to layer quantum-resistant encryption over inter-region traffic using Cloud VPN or BoringSSL-backed load balancers
• Designing a key rotation strategy that handles hybrid classical/PQC key pairs without dropping connections
• GCP-specific controls — Cloud KMS, Certificate Authority Service, and rotation scheduling via Cloud Scheduler
• Common interview gotchas: algorithm maturity trade-offs, latency impact of larger PQC key sizes, and hybrid mode rollout

Keywords: post-quantum encryption GCP, Kyber Dilithium TLS, quantum-resistant key rotation, GCP inter-region security, Cloud KMS post-quantum

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