By
Andrew Collins
Research Fellow, OT Architecture and Operations
April 7, 2026
Quantum computing has occupied a place on technology horizon lists for long enough that many executives have developed a comfortable skepticism about the urgency of its implications. That posture is becoming strategically untenable. The timeline for cryptographically relevant quantum computing, the point at which quantum systems can break the encryption standards that currently protect critical infrastructure communications, industrial control systems, and sensitive operational data, has compressed materially. Organizations that have not begun assessing their cryptographic exposure are falling behind a transition that will not wait for them.
The Nature of the Risk
Contemporary cybersecurity depends on encryption standards that are computationally infeasible to break with classical computers. Quantum computers, operating on fundamentally different principles, have the theoretical and increasingly demonstrated capacity to undermine these protections. The most widely used public key cryptographic systems, which secure communications across virtually every networked environment, are specifically vulnerable to quantum attack.
This creates a risk with an unusual characteristic: adversaries can collect encrypted data today and decrypt it once quantum capability becomes available. For organizations handling sensitive operational data with long-term strategic value, the exposure may already exist whether or not quantum computing has yet reached operational relevance.
Critical Infrastructure Implications
Industrial control systems, operational technology networks, and the communications infrastructure connecting them rely on the same cryptographic foundations as enterprise IT environments. In many cases, the hardware and software embedded in these systems cannot be updated through software patches. Cryptographic transitions in operational technology environments require hardware replacement cycles measured in years, not months.
This timeline mismatch is the core leadership challenge. The transition to post-quantum cryptographic standards requires organizations to begin planning and investment now, not when quantum systems reach operational capability. By the time the threat is visible in the threat landscape, the window for orderly transition will have closed for organizations that delayed preparation.
The Standards Landscape Is Clarifying
The National Institute of Standards and Technology has finalized post-quantum cryptographic standards, providing organizations with a foundation for planning their migration. This development removes a significant planning uncertainty that previously justified delay. Organizations now have the standards framework needed to assess their current cryptographic exposure and develop a transition roadmap.
What Leadership Action Looks Like
Executives responsible for critical infrastructure and industrial operations should direct their technology and security teams to produce an inventory of cryptographic dependencies across both IT and operational technology environments. They should understand which of those dependencies carry long replacement timelines, and they should establish a migration prioritization framework based on data sensitivity and asset replaceability.
Quantum computing is not a distant theoretical concern. It is an active area of state-sponsored research by adversaries who are explicitly motivated by its potential to compromise the security infrastructure of their rivals. Leadership that treats this as a future problem to be addressed by future teams is making a decision, whether they recognize it as one or not.
