FAQs

Quantum computing is a new computing model that uses qubits instead of ordinary binary bits. Qubits can use Quantum effects such as superposition, entanglement, and interference to solve certain classes of problems in ways classical computers cannot efficiently match. For cybersecurity, the concern is not that Quantum computers make every attack easy; it is that they change the math behind today’s public-key encryption.

Classical computers process information as 0s and 1s. Quantum computers manipulate Quantum states, which allows specific algorithms to explore mathematical structures differently. That advantage is narrow but powerful: it is especially relevant to problems such as integer factorization and discrete logarithms, which underpin RSA, Diffie-Hellman, and elliptic-curve cryptography.

Encryption protects data by converting readable information into protected ciphertext that only authorized parties can unlock. It secures banking sessions, payment rails, digital signatures, certificates, identity systems, APIs, software updates, and records. When encryption trust weakens, confidentiality, authentication, non-repudiation, and transaction integrity weaken with it.

Modern public-key cryptography relies on mathematical problems that are infeasible for classical computers at a real-world scale. A cryptographically relevant Quantum computer running Shor’s algorithm could attack RSA, Diffie-Hellman, and ECC by solving the underlying factoring or discrete-log problems. That would threaten key exchange, digital signatures, certificates, and identity assurance.

A Quantum attacker would not need to “guess” passwords one by one. Against vulnerable public-key systems, the attacker could use a sufficiently powerful Quantum computer to derive private-key material from public information, break historical key exchanges, forge signatures, or impersonate trusted services. In practical terms, encrypted traffic, signed records, software packages, certificates, and authentication chains could become untrustworthy if they depend on RSA, DH, or ECC without a Quantum-Safe migration path.

HNDL means adversaries collect encrypted traffic or files today and store them until Quantum capability can decrypt them later. This matters for banks, healthcare, government, legal, and infrastructure environments because long-lived sensitive data may remain valuable for years. The breach can happen now even if the decryption event happens later.

There is no public evidence that today’s Quantum computers can break production-scale RSA or ECC. The risk is strategic and time-sensitive because standards bodies, governments, and major technology providers are already preparing. Migration takes years: discovery, inventory, vendor coordination, testing, policy updates, certificate transition, and deployment cannot be compressed safely at the last minute.

PQC is cryptography designed to resist attacks from both classical and Quantum computers while running on ordinary classical infrastructure. It does not require Quantum hardware. The goal is to replace or augment vulnerable public-key algorithms with standards-based Quantum-Resistant algorithms for key establishment and digital signatures.

No. PQC is software-and-protocol cryptography that can be deployed across existing networks, applications, devices, and cloud systems. QKD relies on specialized Quantum communication hardware and physical channels. For most enterprises, PQC is the scalable migration path because it aligns with NIST standards and practical modernization of current infrastructure.

The highest-priority systems are those using RSA, Diffie-Hellman, or ECC for TLS, VPNs, PKI, certificates, code signing, payment systems, identity federation, APIs, secure email, file transfer, hardware security modules, firmware updates, and long-retention encrypted records. The exposure is not limited to data in transit; it also includes keys, trust chains, signatures, and archival records.

NIST finalized the first three PQC Federal Information Processing Standards in August 2024: FIPS 203 for ML-KEM, the primary key-encapsulation mechanism for general encryption; FIPS 204 for ML-DSA, a lattice-based digital signature standard; and FIPS 205 for SLH-DSA, a stateless hash-based digital signature standard. NIST also selected HQC in March 2025 as a backup encryption algorithm for future standardization.

The U.S. policy direction is clear: federal agencies must inventory Quantum-vulnerable cryptographic systems and plan migration to PQC. The Quantum Computing Cybersecurity Preparedness Act is codified at 6 U.S.C. §1526. OMB M-23-02 initiated federal cryptographic inventory and migration planning. CISA, NIST, and NSA recommend a Quantum-readiness roadmap, vendor engagement, cryptographic inventory, and migration plans that prioritize sensitive and critical assets.

CNSA 2.0 is NSA’s Quantum-Resistant cryptographic guidance for National Security Systems and related environments. It signals a generational shift away from legacy public-key assumptions and toward Quantum-Resistant algorithms, crypto-agility, and staged transition planning. While not every private organization is directly governed by CNSA, it is a strong indicator of where high-assurance cryptography is moving.

Major technology providers are already moving. Google announced a 2029 timeline for PQC migration and prioritized authentication and digital signatures in its threat model. Cloudflare has deployed Post-Quantum protections for Zero Trust and WARP traffic. AWS supports Post-Quantum/hybrid TLS and Post-Quantum signing capabilities across selected security services. Microsoft has introduced PQC capabilities for Windows Insiders and Linux through SymCrypt and OpenSSL integration. The market signal is clear: PQC is moving from research to deployment.

Crypto-agility is the ability to identify, replace, test, and govern cryptographic algorithms, keys, protocols, certificates, and libraries without rebuilding the enterprise. It matters because PQC will continue evolving. Organizations need an architecture that can move from legacy algorithms to NIST standards, adapt to future standards such as HQC or FIPS 206, and avoid being trapped by hard-coded cryptography.

PQC migration affects certificates, key sizes, protocols, authentication flows, HSMs, APIs, legacy systems, vendor dependencies, audit evidence, performance, rollback planning, and interoperability. The work begins with visibility: knowing where cryptography exists, what it protects, who owns it, how long the data must remain confidential, and which dependencies can or cannot support Quantum-safe controls.

Quantum Infinite is a Quantum cybersecurity and Post-Quantum migration company focused on helping financial institutions and high-trust organizations move toward Quantum-Safe security without exposing sensitive data. The company positions itself around Zero-Data Post-Quantum Migration, air-gapped execution, data sovereignty, and alignment with NIST PQC standards and U.S. cybersecurity mandates.

Quantum Infinite provides Post-Quantum readiness and migration services including exposure discovery, web server and URL cryptographic analysis, crypto-asset mapping, risk prioritization, NIST-aligned PQC migration planning, Zero-Data PQC transformation, air-gapped execution models, crypto-agility frameworks, compliance-readiness support, and executive/board-level Quantum-risk reporting.

Quantum Infinite provides Post-Quantum readiness and migration services, including exposure discovery, web server and URL cryptographic analysis, crypto-asset mapping, risk prioritization, NIST-aligned PQC migration planning, Zero-Data PQC transformation, air-gapped execution models, crypto-agility frameworks, compliance-readiness support, and executive/board-level Quantum Risk reporting.

Quantum Infinite’s Zero-Data Air-Gapped delivery model is designed so security moves to the customer’s environment rather than requiring sensitive data to move out. The migration process follows a controlled sequence: expose and map cryptographic dependencies; classify systems by business criticality, data sensitivity, and retention life; assess vulnerable algorithms and trust paths; design a NIST-aligned roadmap; test hybrid or PQC-ready controls; implement Zero-Data transformation in phases; validate interoperability and rollback; and produce audit-ready evidence for governance and compliance.

Quantum Infinite is built for organizations that need Quantum-safe transformation without sacrificing data sovereignty or operational continuity. Its value is not only algorithm selection; it is governed execution: inventory, prioritization, Zero-Data migration, air-gapped deployment, crypto-agility, compliance alignment, and proof that high-impact systems have moved toward a Quantum-Safe trust foundation. For financial institutions, that means reducing Quantum exposure before Q-Day turns legacy encryption into historical liability.

A CBOM is an inventory of every place cryptography is used across applications, networks, cloud services, vendors, certificates, APIs, HSMs, databases and data flows. A practical CBOM should capture the algorithm, key size, protocol, certificate, library, asset owner, business function, data sensitivity, expiration date, vendor dependency and quantum vulnerability. Quantum Infinite helps banks build this inventory without moving sensitive customer data, then turns it into a prioritized PQC migration roadmap.

Crypto agility starts with discovery, not replacement. The steps are: inventory cryptographic assets, classify business and compliance risk, identify RSA/ECC and weak dependencies, define approved algorithm policies, decouple cryptography from hard-coded applications, test hybrid and post-quantum options, update certificates and key-management workflows, validate interoperability, document rollback controls and continuously monitor drift. Quantum Infinite supports this as a staged readiness, remediation and governance process.

Cryptographic agility is the ability to change cryptographic algorithms, keys, protocols and trust paths quickly without breaking business systems. For banks, this means being able to move away from vulnerable RSA/ECC dependencies, rotate keys, update certificates, support NIST PQC standards and maintain audit evidence without large-scale operational disruption.

Quantum Key Distribution, or QKD, uses physics and specialized hardware to distribute keys over specific links. Post-Quantum Cryptography, or PQC, uses new mathematical algorithms designed to run on today’s networks, applications, cloud systems and devices. QKD may be useful in niche high-security channels, but PQC is the practical migration path now being standardized for broad enterprise and public-sector adoption.

No public evidence shows that a cryptographically relevant quantum computer can break RSA-2048 today. The risk is that progress in hardware, error correction and quantum algorithms could make RSA and ECC unsafe within the planning horizon of long-lived data and enterprise migration cycles. The right question is not the exact Q-Day date; it is whether the bank’s data retention period plus migration time exceeds the quantum-risk timeline. If yes, preparation must start now.

A focused readiness assessment or pilot can often be scoped in weeks. A bank-wide migration can take 12 to 36 months or longer depending on application count, vendor dependencies, certificate infrastructure, HSM limitations, core banking systems, payment rails, mobile apps, APIs, cloud workloads and audit requirements. Quantum Infinite’s approach is phased: assess first, prioritize high-risk systems, pilot safely, then expand through controlled migration waves.

AES-256 is generally considered strong against known quantum attacks. Quantum computing is a much larger threat to public-key systems such as RSA, Diffie-Hellman and ECC because Shor’s algorithm can theoretically break the math they rely on. The banking concern is that AES is often protected or exchanged using public-key cryptography. Therefore, even when AES-256 is strong, the key exchange, certificates, signatures and trust chain may still need PQC migration.

Harvest now, decrypt later means attackers steal or record encrypted data today and wait until future quantum computers can decrypt it. This is especially serious for banks because account data, customer records, loan files, transaction archives, merger documents, legal records and identity data may remain sensitive for many years. PQC readiness protects the future confidentiality of data that is already valuable today.

Cost depends on scope. A discovery and readiness assessment is far less expensive than a full enterprise remediation program. Pricing is influenced by the number of applications, branches, vendors, certificates, HSMs, APIs, databases, cloud environments, compliance requirements and testing cycles. A practical budget model separates the work into assessment, CBOM creation, migration planning, pilot implementation, remediation waves and ongoing crypto-agility governance. Quantum Infinite helps clients start with a controlled assessment so the bank pays for clarity before committing to broad transformation.

ML-KEM and SLH-DSA solve different problems. ML-KEM, standardized as FIPS 203, is used for key establishment and key encapsulation, making it central to quantum-safe encryption workflows. SLH-DSA, standardized as FIPS 205, is a stateless hash-based digital signature algorithm designed as a conservative signature option. They are not interchangeable. For signatures, NIST also standardized ML-DSA under FIPS 204, which is the primary lattice-based digital signature standard. Banks should map algorithms to use cases rather than choosing one algorithm for everything.

Traditional public-key cryptography such as RSA and ECC relies on math problems that are hard for classical computers but vulnerable to a sufficiently powerful quantum computer. Post-quantum cryptography uses different mathematical foundations, such as lattice-based and hash-based constructions, that are designed to remain secure against both classical and quantum attacks. In practice, PQC migration is not only an algorithm swap; it requires inventory, testing, interoperability, certificate updates, vendor coordination, governance and operational proof.