TL;DR: Quantum computers will eventually break today’s public-key encryption, so organizations must inventory cryptographic assets, prioritize high-risk systems, and begin migrating to post-quantum algorithms now. Treat this as a governance and budget issue owned by the board, not just an IT project.
1. Frame the Risk for the Board
Translate the quantum threat into business language: data stolen today can be decrypted later (“harvest now, decrypt later”), regulatory exposure is rising, and migration takes years. Present a one-page risk summary with affected systems, data sensitivity, and a timeline.
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2. Inventory Cryptographic Assets
Build a register of where encryption is used: TLS endpoints, VPNs, code signing, key stores, hardware security modules, and third-party dependencies. Assign an owner to each asset and note algorithm, key length, and data shelf life.
3. Prioritize by Data Lifetime and Exposure
Rank systems by how long data must stay confidential and how exposed they are. Long-lived secrets (health records, IP, financial data) and internet-facing services come first. Use a simple high/medium/low matrix the board can review.
4. Set a Migration Roadmap and Budget
Adopt a crypto-agility principle: prefer vendors and architectures that allow algorithm swaps without re-engineering. Sequence pilots, vendor contracts, testing, and cutover dates, and attach cost estimates to each phase.
5. Assign Governance and Report Progress
Name an executive sponsor, integrate crypto risk into the enterprise risk register, and report quarterly metrics: assets inventoried, systems migrated, exceptions granted. Make migration a standing board agenda item.
Tips
Start with a pilot on one high-value system to build internal expertise. Require crypto-agility clauses in new procurement contracts. Track NIST post-quantum standards and vendor support. Avoid “big bang” cutovers—run hybrid classical-plus-post-quantum configurations during transition. Document exceptions with expiry dates.
FAQ
Q: When will quantum computers break current encryption?
A: Estimates vary, but experts advise planning for a credible threat within 10–15 years—and data captured now may already be at risk.
Q: Do we need to replace all encryption immediately?
A: No. Prioritize long-lived, high-value, and internet-facing systems first, then phase the rest through a documented roadmap.
Q: Who should own this initiative?
A: A named executive sponsor (often CISO or CIO) with board oversight, supported by asset owners and procurement.
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