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Post-Quantum Cryptography (PQC) Migration Support

Quarkslab is one of the first French CESTIs certified by ANSSI for Post-Quantum Cryptography. We help you navigate the transition, from understanding the risks to full implementation and long-term support. Don’t wait to begin migrating your solutions; we’re here to support you at every stage!

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The 6 Phases of PQC Migration

Phase 0

Understanding PQC & the Challenges

  • Gain a high-level overview of post-quantum concepts and cryptographic solutions
  • Identify real threats to your infrastructure and product lifecycle
  • Understand the strategic and technical challenges of PQC migration

Phase 1

Inventory & Evaluation

  • Map all uses of RSA, ECC, DH, etc.
  • Identify affected products, protocols, third parties, and libraries
  • Categorize use cases by business criticality, exposure, and data lifespan

Phase 2

Migration Planning

  • Define a phased migration plan (crypto-agility, hybridization, replacement)
  • Update technical specifications for products and suppliers
  • Select suitable post-quantum standards (ML-KEM, ML-DSA, SLH-DSA, HQC, etc.)

How Quarkslab helps?

We offer tailored training sessions, from high-level overviews to in-depth technical workshops designed for both managers and engineering teams.

How Quarkslab helps?

We perform a full cryptographic audit,automated using Crypto Condor or DeltAFLy, or fully tailored; to identify weak algorithms, uncontrolled usages, and hidden cryptographic dependencies.

How Quarkslab helps?

We provide expert guidance on cryptographic hybridization, assist with crypto-agile integration, and offer support compliance for ANSSI, NIST, and FIPS-203 to 205.

Phase 3

Pilot Migration & Testing

  • Implement PQC on a limited but critical scope
  • Test performance and resilience (memory safety, basic side-channels, etc.)
  • Ensure compatibility with partners, clients, and existing systems

Phase 4

Staged Deployment

  • Gradual deployment within internal systems, then externally
  • Maintain crypto agility in critical components
  • Support both generations of algorithms during the transition

Phase 5

Ongoing Security Maintenance

  • Keep up with evolving standards and attack vectors
  • Regularly review and update implementations
  • Plan for replacement, emergency, or update mechanisms

How Quarkslab helps?

We conduct PQC audits and penetration tests, analyze the security of implementations, and develop custom testing tools and secure cryptographic wrappers to ensure robust and reliable integration.

How Quarkslab helps?

We support the integration of PQC in embedded, constrained, or sensitive environments, help with certification processes, and offer continuous monitoring of PQC vulnerabilities.

How Quarkslab helps?

We offer long-term support for both defensive and offensive cryptography, proactively detect vulnerabilities in next-generation algorithms, and develop rapid response capabilities to address emerging threats.

Frequently Asked Questions

1. What is post-quantum cryptography?

Post-quantum cryptography (PQC) refers to cryptographic algorithms designed to resist attacks from quantum computers. Unlike traditional encryption methods such as RSA and ECC, PQC algorithms are built to withstand quantum computing.

2. Why is post-quantum cryptography important?

Quantum computers could one day break current encryption standards, putting secure communications, financial transactions, and private data at risk. PQC helps ensure future-proof protection, even against quantum-enabled attacks.

3. What is "Harvest Now, Decrypt Later"?

“Harvest Now, Decrypt Later” (HNDL) is a threat model where encrypted data is intercepted and stored today—under the assumption that a quantum computer will be able to decrypt it in the future. Sensitive information (like medical records or government secrets) may still be valuable years or decades later, making this a serious long-term risk.

4. Are quantum computers a threat today?

Not yet. Current quantum computers are too limited to break real-world encryption. However, research is advancing rapidly, and security experts recommend preparing now to avoid future vulnerabilities.

5. How does post-quantum cryptography work?

PQC uses mathematical problems that are believed to be hard for both classical and quantum computers to solve. Common approaches include:

  • Lattice-based cryptography
  • Hash-based cryptography
  • Code-based cryptography

6. 6.Who is developing post-quantum cryptography standards?

The **U.S. National Institute of Standards and Technology (NIST)** is leading a global effort to standardize quantum-resistant cryptographic algorithms. In 2022, NIST announced 4 finalists, and standardization is ongoing: ML-DSA, ML-KEM, SL-DSA, and FN DSA. A fifth one, HQC, was added in 2025.

7. When will post-quantum cryptography be widely used?

Adoption is already beginning across industries. Full deployment will take years, but many forward-thinking organizations are acting now to secure long-term data confidentiality.

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Whether you’re in early exploration or deep in crypto planning, Quarkslab is here to help.

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