Post-Quantum Cryptography: The Migration Imperative

The clock is ticking on classical cryptography. With NIST’s publication of the first post-quantum cryptographic standards in August 2024, the question is no longer whether to migrate but how fast your organisation can move.

The Threat Landscape

Quantum computers capable of breaking RSA-2048 and ECC are projected to arrive between 2030 and 2035. But the threat is already here. Store Now, Decrypt Later (SNDL) attacks mean adversaries are harvesting encrypted data today, banking on future quantum capabilities to decrypt it.

For organisations handling sensitive data with long-term value — financial records, healthcare data, government communications, intellectual property — the window to act is closing.

NIST’s Post-Quantum Standards

In August 2024, NIST finalised three post-quantum cryptographic algorithms:

• ML-KEM (CRYSTALS-Kyber) — Key encapsulation mechanism for secure key exchange
• ML-DSA (CRYSTALS-Dilithium) — Digital signature algorithm for authentication
• SLH-DSA (SPHINCS+) — Hash-based signature scheme as a conservative backup

These algorithms are designed to resist attacks from both classical and quantum computers, providing a bridge to the post-quantum era.

Building Your Migration Roadmap

A successful PQC migration requires a structured approach:

Phase 1: Cryptographic Inventory

Catalogue every cryptographic asset in your infrastructure. This includes TLS certificates, VPN configurations, code signing certificates, database encryption, API authentication, and stored encrypted data.

Phase 2: Risk Assessment

Not all cryptographic assets carry equal risk. Prioritise based on data sensitivity, retention period, and exposure to SNDL attacks. Financial institutions and healthcare providers should treat this as urgent.

Phase 3: Hybrid Implementation

Begin with hybrid cryptographic schemes that combine classical and post-quantum algorithms. This provides quantum resistance while maintaining backward compatibility during the transition period.

Phase 4: Full Migration

Systematically replace classical algorithms with NIST-approved post-quantum alternatives across your infrastructure.

The Cost of Waiting

Every month of delay increases your organisation’s exposure to SNDL attacks. Data encrypted today with RSA or ECC will be trivially decryptable once cryptographically relevant quantum computers arrive.

The organisations that begin their PQC migration now will have a significant advantage — not just in security posture, but in regulatory compliance as governments begin mandating quantum-resistant cryptography.

How We Help

At Eigen State, we guide organisations through every phase of PQC migration. From initial cryptographic inventory to full deployment of quantum-resistant algorithms, we provide the technical expertise and strategic clarity to navigate this transition.

Get in touch to discuss your PQC readiness.