For years, “Q-Day,” or the moment quantum computers break modern encryption, has been treated as a distant problem. But thinking of quantum as a future, singular event is a mistake.
The timeline is accelerating rapidly. This summer’s White House Executive Order 14412 mandates sweeping federal upgrades to post-quantum standards by the end of 2030, and the Treasury Department’s recently announced Quantum-Readiness Task Force highlights the systemic risks already present in the financial sector. The push extends well beyond the U.S. with the EU establishing a coordinated roadmap for post-quantum cryptography (PQC) adoption as well, while the U.K. has outlined its own migration milestones through 2035.
But the real threat isn’t that quantum suddenly flips a switch. It’s that hackers are already exploiting the lead-up. Through “harvest now, decrypt later” (HNDL) attacks, bad actors are collecting encrypted traffic today to break it tomorrow. If your sensitive data has a shelf life of more than a couple years, your network’s already carrying architectural debt. The post-quantum cryptography (PQC) era started the moment adversaries began saving your data.
Your board, CEO, CIO, and CISO need to treat quantum readiness as an enterprise risk, not a niche security project. That commitment’s what gets you a real budget, realistic deadlines, and regular progress reviews.
You don’t need to rebuild your entire tech stack on day one. You just need to establish who’s driving the transition. Preparing for PQC should start with a small cross-functional team that owns your cryptography. Its job is to find cryptographic debt, set policy, push vendors, and get you to quantum-safe standards before attackers get your data.
Five Steps to Take Today
You don’t need to tackle everything at once, but you do need a clear plan. Here are five practical steps to start building your quantum readiness today.
- Build out your Cryptographic Bill of Materials (CBOM). A CBOM is a complete inventory of every place you use cryptography, from applications and devices to network connections, certificates, and third-party systems. Document which algorithms are in use, where they’re deployed, and what they’re protecting. You can’t migrate what you can’t see. And a clear inventory is the first step toward knowing what needs to change.
- Layer on a Quantum Bill of Materials (QBOM). Use your CBOM to identify which systems rely on quantum-vulnerable cryptography. Then, rank them by risk and urgency. Start with high-value assets (HVAs), critical infrastructure, and sensitive data that needs to stay protected for years. Consider how long that data must remain confidential, how exposed it is today, and how difficult each system will be to upgrade. Not everything needs to move at once, but your highest-risk systems shouldn’t be last in line.
- Name one accountable leader. Quantum readiness is a leadership responsibility and shouldn’t be an IT afterthought. Assign one person to own the transition, coordinate across IT, security, compliance, and procurement, and keep progress on track. That leader should have the authority to set priorities, secure budgets, and hold teams accountable. Without clear ownership, even the best migration plans can stall before they get started.
- Don’t create a bespoke PQC project. Avoid the urge to treat this as a massive, disruptive rip-and-replace. Piggyback directly on your existing tech lifecycle, i.e. routine software updates, cloud migrations, and scheduled hardware refreshes. When cryptographic upgrades fit into work that’s already funded and moving, security actually gets deployed.
- Draft your migration plan now. Don’t wait for regulatory deadlines to force your hand. Build a practical roadmap that outlines which systems need to transition, what changes are required, and when each upgrade should happen. Set clear milestones, identify dependencies, and work with vendors to understand their PQC readiness. Prioritize your highest-risk systems first, then build quantum-safe upgrades into your existing technology refresh cycles.
Start with the Connections That Matter Most
As you build your CBOM and QBOM, pay close attention to the connections carrying your most sensitive data. VPN tunnels, site-to-site links, and remote access paths all carry information that could be exposed to HNDL attacks. Securing these connections is a critical part of any PQC migration strategy.
Look for a quantum-secure software-defined networking platform that offers centralized visibility, identity-based access control, and control across devices, clouds, and sites, without requiring a complete rip-and-replace of your infrastructure. Prioritize solutions that support NIST-standardized post-quantum cryptography, including hybrid key exchange combining ML-KEM-1024 (FIPS 203) with classical ECDH P-384, and cryptographic modules validated under FIPS 140-3. The goal is to protect sensitive traffic now while maintaining the flexibility to adapt as cryptographic standards and security requirements evolve.
Quantum readiness doesn’t require changing everything overnight. It starts with knowing what you have, protecting what matters most, and building a network that’s ready for what’s next.
Want a deeper breakdown of the terminology used in this article? Look no further than our complete networking, cybersecurity and cyberwarfare glossary.
