CISO Approach to Crypto Risks and Quantum Security

By 2035, quantum computers could break today’s RSA/ECC, threatening everything from over-the-air updates to payments, V2X, charging, telematics, and dealer systems. And “harvest-now, decrypt-later” means data we encrypt today may be readable tomorrow. Thankfully, there’s a path forward with Post-Quantum Cryptography (PQC). So here's what we’re doing (and what I recommend): 1️⃣ Prioritize what matters: Classify apps/data by sensitivity & lifespan (vehicles, keys, firmware, contracts). Tackle the critical 10% first. 2️⃣ Start pilots now: Stand up PQC for key exchange and signatures (NIST picks: CRYSTALS-Kyber, Dilithium, plus FALCON/SPHINCS+ where appropriate). Wrap legacy with interim controls where upgrades aren’t yet feasible. 3️⃣ Engineer for the edge/IoT: Plan for constrained ECUs and long service lives; align PQC with model year cycles and sunset plans to avoid hardware rip-and-replace. 4️⃣ Educate & govern: A cross-functional council (CISO, engineering, legal, procurement) to drive roadmap, metrics, and auditability. Quantum risk isn’t a future storm; it’s a countdown. Organizations that move now will secure their platforms and earn customer trust in the next digital economy. #Cybersecurity #PQC #RiskManagement 📸: BCG

🚨 "Quantum computers won’t politely wait for your 5-year security roadmap." 🚨 As a CISO who also architects AI systems, that line from Google’s latest call-to-arms hit me hard. Here are three takeaways every security and engineering leader should digest today: 1️⃣ We’re on borrowed time. Research now shows a cryptographically relevant quantum computer could shrink RSA-2048’s wall of math to rubble sooner than we assumed. Attackers know this and are already in “store-now-decrypt-later” mode. 2️⃣ Standards exist-adoption lags. NIST locked in the first post-quantum cryptography (PQC) algorithms in 2024, but most enterprises still can’t point to a migration plan. Google started in 2016 and is racing to complete its own shift by 2030. That’s the benchmark. 3️⃣ Crypto-agility is a board topic. Our infrastructures must evolve like living code: modular, upgradeable, and continuously tested. Embedding PQC, building key rotation pipelines, and auditing long-lived data stores are now business resilience imperatives, not R&D projects. My teams are mapping data lifecycles and sunsetting legacy algorithms this quarter. What’s your first step toward a quantum-ready stack, and what’s holding you back? #CyberSecurity #PostQuantum #Cryptography #CISO #AI Read more: https://lnkd.in/es-qxxSY

Reading A Practitioner’s Guide to Post-Quantum Cryptography from the Cloud Security Alliance made me pause. It highlights something many organizations still underestimate very often: modern cryptography was not designed for a future with cryptographically relevant quantum computers (CRQCs). This threat is also not theoretical. The risk comes from Store Now, Decrypt Later attacks, where encrypted data can be harvested today and broken once quantum capabilities mature. Time, not just technology, becomes the critical risk factor. Key highlights from the guide • Shor’s and Grover’s quantum algorithms threaten most public-key cryptography in use today, including RSA, Diffie-Hellman, and elliptic-curve algorithms • CRQCs may emerge by the early 2030s, putting long-term-value data at risk even if systems are secure today • Data confidentiality and integrity are both impacted by Store Now, Decrypt Later attacks • NIST published post-quantum cryptography standards in 2024 (FIPS-203, FIPS-204, FIPS-205), but enterprise adoption will take time and investment • Risk assessment must begin by identifying which data assets still hold value at “Q-Day,” not by blanket cryptographic replacement Who should take note • Security leaders responsible for long-term data protection strategies • Architects managing encryption for data at rest, data in transit, and non-repudiation • Compliance and governance teams evaluating regulatory and sector-specific quantum readiness requirements • Engineering teams responsible for cryptographic libraries, TLS, VPNs, KMS, and certificate management Why this matters Unlike most cyber threats, quantum risk is driven by time. Data intercepted today may be compromised years later. If enterprises wait until CRQCs arrive, it will already be too late for data with long-term value. At the same time, mitigation is costly, complex, and not yet fully supported by mainstream products. The path forward The guide emphasizes starting with disciplined risk assessment, identifying vulnerable cryptographic functions, and mapping technology components before committing to mitigation. Enterprises should periodically reassess risk, track technology maturity, and align mitigation efforts with CSA Cloud Controls Matrix guidance rather than rushing into premature or unnecessary changes.

Happy to see my article has been published at ABP Live on "Beyond AI: Why Quantum-Safe #Cryptography Is a Business Imperative in 2025" The alarming rise in cyberattacks—both in India and globally—makes one thing painfully clear: traditional encryption is no longer enough. In India alone, businesses stand to lose ₹20,000 crore this year, while global cybercrime costs are projected to reach $13.82 trillion by 2028. Even worse? The impending quantum era threatens to render our current cryptographic systems obsolete. Technologies like RSA, which power everything from internal communications to critical external collaborations, are vulnerable to quantum-enabled decryption. So what must businesses do right now? Embrace Quantum-Safe Messaging: Opt for end-to-end encrypted platforms designed to withstand quantum attacks, especially for communications with clients, partners, and vendors. Follow Standards and Best Practices: NIST has already rolled out the first wave of Post-Quantum Cryptography (PQC) standards—like ML-KEM for encryption and ML-DSA for digital signatures. Think Strategically, Not Just Tactically: Transitioning to PQC is more than a technical upgrade—it’s a strategic initiative. Build governance, crypto-agility, and roadmap planning into your cybersecurity strategy. What the world is doing: - Europe aims to migrate to quantum-safe encryption by 2030, starting with risk assessments and awareness campaigns in 2026 - The UK’s NCSC is urging organizations to begin full migration planning by 2028 and complete it by 2035 - Setting an example in the private sector, it has integrated post-quantum encryption into its WireGuard and Lightway protocols using NIST’s ML-KEM algorithm Reports from India’s BFSI sector show a worrying lack of readiness—yet almost 58% of CISOs recognize the threat within the next three years Key takeaway: Quantum-safe cryptography isn’t a futuristic concept—it’s a present-day necessity. The threat of "store now, decrypt later" attacks means the data we transmit today may be vulnerable tomorrow. Waiting isn’t an option Whether you’re in BFSI, government, telecoms, or healthcare, the time to act is now. Let’s lead the shift toward a secure quantum future. #QuantumSafe #Cybersecurity #PostQuantumCryptography #CryptoAgility #DigitalTrust #QuantumReady #QNulabs QNu Labs

When I share with CISOs and students that a full-scope Post-Quantum Cryptography (PQC) migration program plan hits 120,000 tasks, the first reaction is silence. Then come skeptical questions: "Surely you counted every single certificate and every vulnerability as a task?" They assume it's just bad project planning. It isn’t. I have been warning about this scale for years. But what has changed is that many others are saying it now. Peer-reviewed research and national cyber agencies are now getting increasingly explicit about the timelines and operational reality: this is a massive, multi-year transformation, not a patch cycle. The integrated master schedules (IMS) for the quantum security migration programs I worked on routinely reach tens of thousands of lines, with the largest global implementation hitting that 120,000-task mark. This isn't because we listed every server and vulnerability. We stopped treating cryptography like a background utility and started treating it like structural steel. That needs replacing while the building is occupied. When you account for the "invisible" work - the governance that makes changes safe, the vendor roadmap negotiations, the OT safety checks, and the workforce training - the math is clear. "Remediation" (the actual crypto upgrades) is often only ~20% to 30% of the work. The other 80% is the enablement machinery required to execute it without breaking the business. A reality check: I am not suggesting every organization launch a six-figure task program on day one. In the real world of budget cycles and competing priorities, most will need to deconstruct this into manageable projects - but you must understand the full horizon to avoid building foundations that collapse in Year 3. I wrote this article to break down exactly where that number comes from. Read the breakdown: https://lnkd.in/dsxyeUBX Some key realities: - Vendors are the critical path: You can't migrate what they haven't shipped. - Enablement > Engineering: Skills, governance, and evidence gathering will consume more hours than cipher-suite edits. - In constrained OT environments, you aren't just patching; you're often replacing hardware or redesigning protocols. #PostQuantum #CISO #CyberSecurity #PQC #QuantumReadiness #QuantumSecurity #QuantumResilience #Cybersecurity #QuantumMigration

📌The financial sector has now moved from quantum awareness to quantum execution. Europol , FS-ISAC , and the Quantum Safe Financial Forum (QSFF), together with major financial institutions, published: “Prioritising Post-Quantum Cryptography Migration Activities in Financial Services” ; a practical migration framework designed specifically for financial institutions. What makes this report particularly relevant for #boards, #regulators, and #CISOs? It introduces a structured prioritisation methodology based on two measurable dimensions: 1️⃣ Quantum Risk Score Derived from: • Shelf life of protected data • Exposure • Severity of compromise 2️⃣ Migration Time Score Derived from: • Solution availability • Execution cost and time • External dependencies Migration Priority is determined by combining both scores into a risk–time matrix (see pages 8–10) of the Report below ⬇️ . ♨️ This shifts the conversation from “When will Q-Day happen?” to “Which business use cases require action now, and which require long-term orchestration?” Two examples in the report illustrate this distinction: 🔹 Points of Sale (#PoS) Medium quantum risk but high migration complexity due to hardware lifecycles, ecosystem coordination, and standardisation uncertainty (pages 12–15) . ⛔️Early planning is essential to avoid costly out-of-cycle replacements. 🔹 Public Websites (#TLS_confidentiality) Medium quantum risk but low migration time due to hybrid schemes such as X25519MLKEM768 already supported by major browsers and CDNs (pages 16–19) . ⛔️This is one of the earliest practical deployment opportunities for quantum-safe protection in production environments. Another important contribution of the report is its focus on cryptographic antipatterns (pages 21–24) . Before large-scale PQC migration, institutions can implement no-regret actions: • Automate TLS certificate lifecycle management • Standardise TLS configurations (TLS 1.3 baseline) • Eliminate legacy cipher dependencies • Remove hard-coded credentials • Strengthen key management governance This approach aligns closely with supervisory expectations: #quantum_readiness must integrate into existing risk frameworks, asset lifecycle planning, and vendor coordination. For financial institutions, the message is clear: ❌Quantum safety is not a single migration event. ❌It is a prioritised, staged governance programme that integrates cryptography, procurement, architecture, and regulatory alignment. Full publication: Europol (2026), Prioritising Post-Quantum Cryptography Migration Activities in Financial Services Available via Europol Publications Office: https://lnkd.in/d2bgsVKm #PostQuantumCryptography #PQC #QuantumRisk #FinancialServices #CybersecurityGovernance #DigitalResilience #CryptoAgility #QuantumTransition #FinancialStability

A recent comprehensive study, issued by Federal Office for Information Security (BSI) on the Status of #Quantum #Computer #Development provides a sober, evidence-based assessment of progress, risks, and timelines, particularly relevant for #cryptography, #cybersecurity, and strategic planning, with a focus on applications in #cryptanalysis. Key takeaways: • Quantum advantage is real, but still narrow Quantum computers have demonstrated advantage only on highly specialized benchmark problems. Broad, application-relevant superiority remains out of reach. • Cryptography is the primary strategic risk driver Shor’s algorithm continues to pose a credible long-term threat to RSA and elliptic-curve cryptography, while symmetric cryptography (e.g. AES) remains comparatively resilient with appropriate key lengths. • Fault tolerance is the true bottleneck Error rates not qubit counts are the dominant constraint. Scalable, fault-tolerant quantum computing requires massive overheads in error correction and infrastructure. • Leading hardware platforms are converging Superconducting qubits, trapped ions, and neutral atoms (Rydberg) currently lead the field, with rapid progress but no clear single winner. • #NISQ systems are not a near-term cryptographic threat Noisy Intermediate-Scale Quantum (NISQ) devices lack the depth and reliability needed for meaningful cryptanalysis, despite frequent hype. • A realistic timeline is emerging Based on verified advances in error correction, a cryptographically relevant quantum computer may be achievable in ~10–15 years—not decades, but not imminent either. • “Harvest now, decrypt later” remains a credible risk Sensitive data encrypted today may be vulnerable in the future, reinforcing the urgency of post-quantum cryptography migration. • Security preparedness must start now Transition planning, crypto-agility, standards development, and quantum-readiness assessments are no longer optional for governments and critical sectors. 👉 Bottom line: quantum computing is progressing steadily, not explosively, but its long-term implications for cybersecurity and digital trust demand early, structured, and risk-based action today. https://lnkd.in/eMui-D_W

Headline: Q-Day Is Approaching Faster Than Expected, Putting Global Encryption at Immediate Risk Introduction: A growing body of research warns that the timeline for quantum computers to break modern encryption has accelerated dramatically. What was once viewed as a distant technological milestone is now emerging as a near-term systemic risk, with potentially severe consequences for global security, finance, and digital infrastructure. Key Developments and Strategic Risks: Recent studies, including findings from Google, indicate that the computational threshold required for quantum systems to crack widely used encryption standards is significantly lower than previously believed. This suggests that the long-anticipated moment known as Q-Day, when quantum machines can defeat classical cryptography, may arrive much sooner than expected. Modern encryption underpins nearly every aspect of digital life, from banking and communications to national security systems. Once quantum capabilities reach sufficient scale, they could rapidly decrypt sensitive data, including information that adversaries may already be harvesting today in anticipation of future breakthroughs. This creates a “store now, decrypt later” threat model that is already in motion. Despite clear technical pathways to mitigate the risk, including the development and deployment of quantum-resistant cryptography, policy and implementation efforts remain fragmented and slow. Transitioning global systems is a complex, multi-year effort requiring coordination across governments, industries, and standards bodies. The current pace raises concerns that defenses will not be in place before vulnerabilities are exploited. Why It Matters: The acceleration toward Q-Day represents a fundamental inflection point in cybersecurity and global power dynamics. Failure to act decisively could expose critical infrastructure, financial systems, and state secrets to unprecedented compromise. Conversely, early adopters of quantum-safe technologies will gain a strategic advantage in securing digital ecosystems and maintaining trust. The window for proactive transition is narrowing, and the cost of inaction is rapidly increasing. I share daily insights with tens of thousands followers across defense, tech, and policy. If this topic resonates, I invite you to connect and continue the conversation. Keith King https://lnkd.in/gHPvUttw

What if everything encrypted today could be read tomorrow, that’s the quantum threat. Now physics is pushing back, so we can reliably generate single photons on a chip. It moves quantum communication technologies like quantum key distribution (QKD) and quantum-secure networking out of massive optical benches and toward integrable hardware. That opens the path for quantum-secure links and primitives embedded directly into networking gear, IoT devices, and critical infrastructure components. It’s a clear sign that the foundational infrastructure of secure communication is about to evolve from mathematical assumptions to physics-based guarantees. Beyond the hype, it shifts security from math-based trust to physics-based guarantees. ↳ Quantum Security Is Becoming Foundational Today’s secure channels, TLS, VPNs, and PKI are built on cryptographic assumptions that can, at least in theory, be weakened by advances in computing power (classical or quantum). But when you can reliably generate single photons on a chip, you have the building block for quantum key distribution, where eavesdropping becomes detectable because of how quantum states behave. This matters for risk and exposure. ↳ Secure Channels Are Becoming Protocols + Hardware In conventional security programs, cryptographic updates are software exercises: libraries, certificates, and patches. But quantum communication introduces hardware as a control plane. Trust boundaries are now physical as well as logical. This is where real exposure lives. ↳ Hybrid Interfaces Will Be the First Attack Surface Quantum components will not exist in isolation. They must interface with classical network stacks, key management systems, firmware and driver layers, edge processing units, and identity and authentication infrastructures. Every interface between quantum and classical systems becomes an exposure zone, the exact place where attackers will probe for weaknesses. Attackers exploit the seams between systems, the very interfaces defenders often overlook. Security leadership in the era of quantum is engineering resilience into the systems we already depend on before attackers do. Because exposure lives in the seams between technologies and that is where the next wave of risk will emerge.

MITRE worked with key industry stakeholders a couple years ago to launch the Post Quantum Cryptography (#PQC) Coalition, looking to accelerate implementation and adoption of PQC ciphers once the core algorithmic standards were completed. The coalition just released its migration roadmap, designed to help CIOs and CISOs with a transition that is going to be much more complicated than most people realize. Migration starts with inventorying the cryptography used by your organization, which can be extremely difficult to answer. Beyond things like PKI used for IdM or TLS-based web services, cryptography shows up all over the place, from code signing to network management and control functions. While many vendors, cloud services, SaaS platforms, etc, will have PQC migration baked into their future offerings, full enterprise migration will have to cope with legacy systems, unmanaged/governed systems, and complex integration challenges across systems. An entire industry is beginning to emerge around helping organizations independently audit/inventory their crypto use, apply stop-gap solutions to legacy systems, and measure overall migration progress. https://lnkd.in/e_kBKKXU