Topic starter
23/10/2026 12:45 am
TL;DR: Negotiation behavior and baselines shift first in a PQC rollout, with Corelight highlighting a staged migration rather than an abrupt switch. Encrypted-traffic monitoring must track metadata, certificates, and timing while some paths still justify decryption.
Editorial analysis by NHI Mgmt Group, based on content published by Corelight: “Post-Quantum Cryptography: The upgrade nobody asked for (but everyone’s getting)”.
Key questions
Q: Why does PQC not eliminate encrypted-traffic visibility?
A: Because defenders do not depend only on payload decryption.
Q: When should organisations use targeted decryption instead of trying to decrypt everything?
A: Use targeted decryption when the path carries high-value or regulated data and the visibility gain justifies the cost.
A: Start with a cryptographic inventory, then separate systems by feasibility rather than by ideal end state.
Practitioner guidance
- Baseline hybrid handshake behaviour Record expected client and service negotiation patterns before PQC adoption expands.
- Preserve metadata-led detection paths Prioritise detections that rely on endpoints, timing, frequency, destinations, and certificate attributes.
- Limit decryption to critical choke points Apply targeted decryption where it materially improves risk reduction, such as high-value services or regulated data paths.
Bottom line: PQC is best understood as a staged migration that changes negotiation behaviour and baselines before it changes the core objective of secure communication.
Glossary terms: Post-Quantum Cryptography, Harvest now, decrypt later, Encrypted Traffic, Hybrid Handshake
Explore further
View Full Forum → | NHI Foundation Course → | Our Services → | Read the full analysis →
This topic was modified 6 days ago by NHI Mgmt Group
23/10/2026 9:49 am
PQC migration is an observability programme, not just a cryptography refresh. The article’s real point is that security teams will experience mixed protocols, larger handshakes, and noisy baselines long before any end state is reached. That makes transition governance the issue, not merely algorithm selection. Practitioners should treat PQC as a staged control-change programme with a clear evidence model.
A question worth separating out:
Q: What should teams do first when PQC starts changing their baselines?
A: Validate whether the change matches an expected migration pattern before treating it as a security incident. Then document which services are upgrading, which are still using legacy crypto, and which channels need deeper monitoring because they carry machine-authenticated trust relationships. The first job is to preserve interpretability of the environment.
👉 Read our full editorial: Post-quantum cryptography changes encryption, not visibility
This post was modified 6 days ago by NHI Mgmt Group