Lattice-based key establishment standard, replacing classical key-exchange mechanisms across protocols like TLS and VPN.
POST-QUANTUM CRYPTOGRAPHY
Concepts, industry relevance, and the path to readiness preparing organizations for the shift to NIST-standardized quantum-resistant encryption.
Overview
What Is Post-Quantum Cryptography?
Post-Quantum Cryptography (PQC) is not cryptography that runs on quantum computers . It is cryptography designed to withstand attacks from one. Today’s HTTPS, VPNs, and digital signatures rely on math problems (like factoring large numbers) that classical computers cannot solve in any reasonable time.
Quantum computers, using Shor’s algorithm, can solve those problems in hours instead of billions of years. PQC introduces new algorithms based on different mathematical structures. Ones with no known efficient quantum attack.
The Risk
The Quantum Threat to Modern Cryptography
Sudden, Not Gradual
Once a cryptographically relevant quantum computer (CRQC) exists, RSA, Diffie-Hellman, and ECC become insecure overnight — not over time.
Harvest Now, Decrypt Later
Attackers are already collecting encrypted traffic today, planning to decrypt it once quantum hardware matures. Long-lived secrets are at risk now.
Symmetric / Asymmetric
AES-256 stays acceptable with longer keys. The real urgency lies in replacing asymmetric encryption used across TLS, VPNs, code signing, and PKI.
NIST Standards
The Three Finalized PQC Standards
Published by NIST in August 2024, these standards form the foundation of every credibleÂ
enterprise PQC migration plan.
FIPS 203
ML-KEM
FIPS 204
ML-DSA
Lattice-based digital signature standard for code signing, document signing, and certificate authorities.
FIPS 205
SLH-DSA
Stateless hash-based signature scheme. A conservative alternative grounded in well-understood hash function security.
Path Forward
5 Steps to Quantum-Resilient Security
- Design systems for crypto-agility easy algorithm swaps without of the re-architecture.
- Map cryptographic exposure across systems, vendors, and data flows.​​
- Partner with quantum-ready ecosystems and decommission classical only configurations.​
- Track NIST and sector-specific timelines; align with the federal 2035 deprecation deadline.
- Partner with quantum-ready ecosystems and decommission classical-only configurations.
Read the Full PQC Research Brief
Detailed analysis of algorithm families, migration complexity, hybrid deployment, and a recommended roadmap