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October 21, 2026
Sudiptaa Paul Choudhury
Quantum Readiness Assessment for Enterprises
A quantum readiness assessment is a structured evaluation of an organisation’s exposure to quantum computing risk: specifically, how much of its infrastructure, data, and third-party ecosystem depends on cryptography that a future quantum computer could break. It combines a cryptographic inventory (where public-key encryption is in use), a risk analysis (what is actually at stake if that encryption fails), and a readiness score (how easily each system could migrate to quantum-safe alternatives).
Unlike a general security audit, a quantum readiness assessment has one specific target: public-key cryptography vulnerable to Shor’s algorithm, specifically RSA, ECC, Diffie-Hellman, and ECDSA. It answers three questions a CISO needs answered before spending a single pound on remediation: what do we have, what is it protecting, and how hard will it be to fix.
The urgency is not about quantum computers existing today. It is about harvest now, decrypt later (HNDL) attacks happening right now. Adversaries are already intercepting and storing encrypted traffic, banking on the ability to decrypt it once a capable quantum computer arrives. Any data with a confidentiality requirement longer than five to ten years, including financial records, health data, defence communications, M&A documents, and source code, is exposed to this risk today, regardless of when Q-Day actually lands.
Long-lived data is the crux of the problem. A medical record or a classified defence communication does not stop being sensitive after a year. It needs protection for decades. If that data is encrypted with RSA-2048 today and intercepted today, it is already compromised the moment decryption becomes feasible, even if that is ten years away. A quantum readiness assessment exists precisely to find this data before an attacker does.
Regulatory timelines are compressing the window further. NIST’s transition plan deprecates RSA-2048 and ECC P-256 by 2030 and aims to remove quantum-vulnerable algorithms from its standards entirely by 2035. NSA’s CNSA 2.0 mandates PQC for new national security systems by 2027. India’s DST National Quantum Mission Task Force sets Critical Information Infrastructure full PQC adoption by 31 December 2029. None of these deadlines are met without first knowing where your vulnerable cryptography lives. That is exactly what an assessment produces.
A credible quantum readiness assessment follows a consistent eight-step sequence. Skipping steps, particularly jumping straight to remediation before completing the inventory, is the most common reason enterprise PQC programmes stall or duplicate work later.
Before any scanning begins, agree what is in scope: which business units, applications, infrastructure, cloud environments, APIs, databases, certificate authorities, and sensitive data repositories will be assessed. Enterprises that skip this step either assess everything at once (which stalls momentum) or miss entire business units that hold the most sensitive long-lived data. A tightly scoped first pass, one business unit, one data centre, one cloud environment, beats an unscoped assessment that never finishes.
Cryptographic inventory is the foundation everything else depends on. Identify every place cryptography is in use: TLS connections, VPNs, PKI, APIs, digital certificates, HSMs, key management systems, code-signing processes, applications, and third-party systems. Most organisations discover significantly more cryptographic assets than expected: certificates and keys accumulate quietly for years across teams, vendors, and legacy systems. Automated discovery tooling is strongly preferred over manual inventory at any meaningful enterprise scale.
With the inventory built, flag every instance of RSA, ECC, Diffie-Hellman, ECDSA, and other public-key cryptography that Shor’s algorithm can break. This step converts a generic inventory into a quantum-specific risk map, separating what is vulnerable from what is not, since symmetric algorithms like AES-256 remain quantum-resistant and do not need the same urgency.
Cross-reference the vulnerable algorithms against the data they protect, and specifically flag anything that must stay confidential for years: financial records, healthcare data, defence communications, customer data, intellectual property, and legal documentation. This is where harvest now, decrypt later risk becomes concrete. A vulnerable algorithm protecting data with a two-year shelf life is a lower priority than the same algorithm protecting a twenty-year state secret or a patient’s genomic record.
Your own infrastructure is only part of the picture. Review cloud providers, SaaS tools, certificate authorities, HSM vendors, network vendors, and security platforms for their PQC or crypto-agility readiness. A perfectly migrated internal environment is still exposed if your certificate authority, payment processor, or core SaaS vendor has not started its own transition. Third-party dependency is consistently one of the most underestimated risk categories in enterprise assessments.
Check whether algorithms, keys, certificates, and protocols across each system can be replaced without a major application or infrastructure redesign. Systems built with hard-coded cryptographic assumptions will need far more time and budget to migrate than systems built with an abstracted, swappable cryptographic layer. This step effectively predicts how expensive and how slow each future migration will be.
Bring everything together into a prioritised risk score for each system, based on algorithm exposure, data sensitivity, business criticality, external exposure, and migration complexity. This scoring turns a long, undifferentiated list of vulnerable systems into an actionable sequence, telling leadership exactly which systems matter most rather than presenting an overwhelming inventory with no clear starting point.
Convert the assessment findings into a phased PQC migration roadmap: highest-risk systems first, third-party dependencies tracked separately, and crypto-agility built into every new procurement and development project going forward so the debt stops growing while you pay down what already exists.
Not every organisation starts from the same position. The right approach depends on available expertise, regulatory exposure, and the complexity of the cryptographic estate.
Self-assessment uses structured questionnaires based on frameworks such as NIST’s NCCoE PQC migration guidance to evaluate cryptographic posture without external engagement. It is low-cost and can be completed quickly by an internal security team. The limitation is scope: questionnaires surface what people know about the estate. They do not discover what has been forgotten, silently accumulated, or embedded in vendor systems. Self-assessment is a reasonable starting point for smaller organisations or as a pre-engagement exercise, but it consistently underestimates the scale of cryptographic exposure at enterprise scale.
An internal audit applies a defined framework, NIST SP 800-53, IEC 62443 for OT environments, or the EU PQC Roadmap milestones, to evaluate cryptographic posture systematically across defined domains. It is more rigorous than a questionnaire and produces documentation suitable for regulatory review. It still depends on the completeness of existing asset registers and the cryptographic expertise of the internal team running it. Most enterprises find that internal audits surface the known unknowns but miss the unknown unknowns: the third-party dependencies, legacy certificates, and OT system cryptography that automated discovery tools consistently find and manual audits miss.
An expert-led engagement combines automated cryptographic discovery tooling with specialist analysis of risk prioritisation, remediation planning, and migration roadmap development. It surfaces the full extent of cryptographic exposure across all layers of the estate, including infrastructure, cloud, OT, third-party platforms, and embedded systems. It produces a risk-scored system inventory, a prioritised migration roadmap, and a vendor dependency map that internal teams are typically not resourced to produce. For organisations with regulatory exposure, complex cryptographic estates, or long-lived sensitive data, this is the approach that produces an actionable programme rather than a compliance document.
A properly run assessment delivers five concrete outcomes for leadership:
A complete cryptographic inventory that covers every algorithm, key, certificate, and protocol across the estate, including the dependencies that were not visible before the assessment began.
A quantum risk register that ranks every system by exposure, combining algorithm vulnerability, data sensitivity, business criticality, and migration complexity into a single prioritised view.
A vendor and third-party dependency map that identifies where the estate is exposed through partners, certificate authorities, cloud providers, and SaaS platforms regardless of the organisation’s own migration progress.
A crypto-agility evaluation for each system that predicts how expensive and how long migration will be, distinguishing systems that can swap algorithms by configuration from those that require a code rewrite or hardware replacement.
A phased migration roadmap tied to business risk and regulatory deadlines rather than generic timelines, with named owners and a sequence that reflects what actually matters most.
If any of these is missing, the assessment is not finished. It is a partial audit dressed up as a strategy document.
Use this as a quick check before commissioning or reviewing an assessment:
The regulatory picture has moved from guidance to requirement across multiple jurisdictions, and the timelines are converging.
India’s position is particularly notable. The DST NQM Task Force report, released February 2026, sets the Critical Information Infrastructure deadline at 31 December 2029, more aggressive than the UK, Canada and the EU, all of which target 2035. India is not one regulator moving. It is an entire regulatory architecture moving in parallel.
QNu Labs’ quantum readiness assessment is the starting point of every engagement. The process combines automated cryptographic discovery, quantum risk scoring, and crypto-agility evaluation with the QShield platform to give enterprises a single, prioritised view of their exposure rather than a static spreadsheet that is outdated within months.
The assessment outputs connect directly to remediation: KyntraQ QKMS for automated key lifecycle management, Hodos PQC for algorithm migration across the software layer, and Tropos QRNG for physics-based entropy at the root of every key generated. Backed by India’s National Quantum Mission and incubated at IIT Madras Research Park, QNu Labs works with organisations across banking, defence, telecom, and critical infrastructure to turn assessment findings into a deployment that closes the gaps found, not a report that describes them.
A quantum readiness assessment is not a compliance checkbox. It is the only way to find out, with evidence rather than assumption, whether your organisation’s most sensitive long-lived data is already exposed to harvest now, decrypt later attacks. The enterprises moving methodically through this process now will migrate on their own timeline and budget. The ones that wait will migrate on an attacker’s timeline instead.