No jargon. No PhD required. A clear explanation of what quantum computing means for your organisation — and what you can do about it today.
When you send a message, process a payment, or store customer data, your systems scramble the information using a mathematical problem that is practically impossible to solve. This scrambling is encryption.
The problems used today — factoring enormous prime numbers — would take a classical computer millions of years to crack. That is why banks, hospitals, governments, and virtually every business on earth trust them.
Your business has a padlock that takes a million years to pick. So far, no thief has been patient enough. But a new kind of thief is arriving — one who can pick it in minutes.
Classical computers use bits; quantum computers use qubits and quantum effects to solve some classes of problems in fundamentally different ways. That does not make them faster at everything, but it matters for specific mathematical problems used by today's public-key cryptography.
A sufficiently capable, fault-tolerant quantum computer running Shor's algorithm could undermine RSA and elliptic-curve public-key cryptography. Today's quantum computers are not yet capable of doing this at cryptographically relevant scale.
The practical response is not to guess an exact breakthrough date. NIST has already standardised post-quantum algorithms, and migration can take years across applications, vendors, certificates, keys and long-lived data.
“Q-Day” is an informal term for the point at which a cryptographically relevant quantum computer could break widely used public-key cryptography. No one knows the exact date. Organisations can still act now because cryptographic migration takes time and long-lived encrypted data may remain sensitive for years.
A long-term risk model known as Harvest Now, Decrypt Later assumes an adversary may capture encrypted information today and retain it in the hope of decrypting it with future capabilities. The relevance depends on how long the underlying information must remain confidential.
This makes long-life sensitive information a present-day planning concern even though a cryptographically relevant quantum computer does not yet exist.
For financial entities, long statutory, contractual and business retention periods can keep sensitive records valuable for years. If those records rely on quantum-vulnerable public-key cryptography, their confidentiality horizon can extend beyond today's migration cycle. Long-life data should therefore be prioritised without assuming an exact 'Q-Day' date.
Start with data that must remain confidential for the longest time, critical identity and authentication systems, externally exposed certificates, and applications that will be difficult to migrate.
Post-quantum cryptography (PQC) refers to a new generation of encryption algorithms designed to resist quantum computer attacks. These are not quantum computers themselves — they are cryptographic approaches designed so that no efficient attack is currently known for either classical or quantum computers under the standards' stated security assumptions.
In August 2024, NIST published its first three final post-quantum cryptography standards:
PQC migration is more than a one-for-one algorithm swap: organisations need cryptographic inventory, crypto-agility, vendor readiness, testing and phased deployment. SEBI CSCRF addresses post-quantum risk for regulated entities, DST has published a national transition roadmap, and RBI's Q-SAFE work should be tracked as an expert-committee initiative unless and until binding directions are issued.
On May 25, 2026, the Reserve Bank of India constituted the Quantum Secure and Adaptive Financial Ecosystem (Q-SAFE) expert committee to examine quantum-security readiness for the financial sector.
The committee's role is to examine how the financial sector should prepare for quantum-era risks and recommend a path forward. Its creation signals regulatory attention, but the committee announcement itself should not be described as a blanket compliance mandate for every financial institution.
RBI announced the committee on 25 May 2026. The official announcement should be tracked for subsequent reports or directions; QryptoNox does not assume a binding deadline or requirement until RBI publishes it.
Preparation can still start now. SEBI-regulated entities already have cryptographic-inventory and post-quantum risk expectations under CSCRF/FAQ, while DST has published a national migration roadmap. The applicable requirement depends on your regulator and entity class.
A Cryptographic Bill of Materials (CBOM) is a structured inventory intended to document cryptographic algorithms, keys, certificates, libraries and their uses within a defined scope. Think of it as a fire-safety register — but for cryptography.
Just as a safety register helps you understand what protective equipment exists and where, a cryptographic inventory helps you understand what cryptography exists, why it is used and what may need migration. The exact evidence required depends on the applicable framework and assessment scope.
SEBI's CSCRF FAQ requires a comprehensive inventory of cryptographic assets for SEBI regulated entities. A CBOM is a practical way to structure that evidence. QryptoNox can build the inventory from questionnaires, approved exports and authorised discovery; a public TLS scan alone is not a complete enterprise CBOM.
Cloud providers cover important parts of the stack, but the customer still retains security responsibilities for its own configurations, identities, data, applications and integrations.
AWS and Azure both operate shared-responsibility models: the provider secures its cloud infrastructure while customers remain responsible for significant parts of configuration, identities, data and application security. Your cryptographic inventory therefore needs to cover the parts of the stack your organisation controls rather than relying on a provider compliance document alone.
QryptoNox gives you a complete quantum risk picture — in plain rupees, with a clear plan, formatted for your board and your auditor.
This guide is educational, not legal advice. Verify current requirements and migration guidance against the source documents.