Preparing your infrastructure for post-quantum cryptography

The transition to post-quantum cryptography will take most enterprises several years. The standards are published, and the practical work can begin now. It starts with knowing where cryptography is used, which few organizations can state with confidence today.

Why the timeline is already running

Data encrypted today can be captured and held until it can be decrypted later. Information that must remain confidential for a decade or more is therefore exposed well before a capable quantum computer exists. Regulators and major technology providers are setting migration expectations accordingly.

Build the inventory first

Cryptography is embedded in certificates, VPNs, applications, hardware modules, firmware and third-party services. An inventory that records the algorithm, key length, owner and data sensitivity for each use is the foundation of every later decision.

The first deliverable of a post-quantum program is an inventory, not an algorithm.

Prioritize by exposure and lifespan

Address systems that protect long-lived sensitive data and those that are exposed to external networks first. Equipment with long replacement cycles deserves early attention, because procurement decisions made now determine what can be upgraded later.

Design for agility

Algorithms will continue to evolve. Favor architectures in which cryptographic components can be replaced through configuration rather than redesign, and ask vendors for their roadmaps. An organization that can change algorithms in an orderly way is prepared for this transition and for the next one.