Post-Quantum Readiness - Inventory, Risk Assessment and Migration Planning

Is your encrypted data safe from future threats?

Cryptographically relevant quantum computers would threaten widely used public-key algorithms including RSA, Diffie–Hellman and elliptic-curve cryptography. Post-quantum cryptography is designed to resist attacks from both classical and quantum computers.

Quantum-vulnerable public-key algorithms support many key-establishment and digital-signature functions used in TLS, VPNs, public key infrastructure, code signing and identity systems. Symmetric algorithms and hash functions are affected differently and should be assessed according to key length, data lifetime and use case.

NSI Global’s readiness advisory identifies cryptographic assets and dependencies, assesses data-lifetime and migration risk and develops a prioritised transition roadmap. Planning can be aligned with ASD guidance and NIST FIPS 203, FIPS 204 and FIPS 205, covering ML-KEM, ML-DSA and SLH-DSA.

What We Assess

Crypto Inventory & Mapping

Develop a cryptographic inventory covering algorithms, certificates, keys, protocols, libraries, applications, hardware and third-party dependencies.

Quantum Risk Assessment

Identify quantum-vulnerable public-key algorithms and assess exposure according to use case, data sensitivity, required confidentiality period and system lifecycle.

Migration to Quantum-Resistant Cryptography

Develop a crypto-agility and migration roadmap covering prioritised systems, vendor dependencies, target algorithms, interoperability testing and implementation milestones.

Governance & Readiness Reporting

Board-level reporting covering exposure, dependencies, decision points, accountable owners and migration milestones.

Why Planning Has Started

NIST post-quantum standards are available for implementation
Cryptographic discovery and migration can span multiple technology cycles
Long-lived encrypted data may be retained for later decryption
Unsupported systems and vendor dependencies can delay transition
Rushed cryptographic changes can create interoperability and implementation risks

Frequently Asked Questions

Why act now, before quantum computers exist?

Because of harvest now, decrypt later. Encrypted data captured today can be stored and decrypted once a cryptographically relevant quantum computer exists. If your data has a confidentiality life of ten years or more, the exposure is already running.

What does "harvest now, decrypt later" mean?

An adversary records encrypted traffic or exfiltrates encrypted data now, with no ability to read it, and holds it until decryption becomes feasible. It requires no breakthrough on the attacker's part today — only storage.

How long does a migration take?

For most organisations, years rather than months. The constraint is rarely the algorithm. It is discovering everywhere cryptography is used, establishing which third-party products support the new standards, and sequencing changes without breaking interoperability. Inventory is the long pole.

Prepare for the Quantum Threat

Schedule your readiness assessment by speaking with our team to evaluate how post-quantum cryptography will impact your digital infrastructure and compliance obligations.

What this engagement does not cover.

Testing is bounded by the scope agreed in writing. We do not test systems outside that scope, and no assessment establishes that an environment is free of vulnerabilities — only that the agreed scope was examined using the agreed techniques within the agreed window. Every report states what was tested, what was not, and what the evidence does and does not support.

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Post-Quantum Cryptography & Readiness Advisory