InfoSec Made Easy OT Security Leadership | NCSC Guidance Series Reducing attack surface in OT environments — why how you connect matters as much as whether you connect In cybersecurity, the concept of attack surface is well understood: the more accessible your systems are to potential adversaries, the more opportunity exists for exploitation. In IT environments, attack surface management has become a mature discipline, with tools, processes, and dedicated teams focused on identifying and reducing unnecessary exposure. In OT environments, the same concept applies — but the stakes, the constraints, and the practical approaches are significantly different. Principle 2 of the NCSC's Secure Connectivity Principles for Operational Technology is focused on exposure management: proactively identifying, assessing, and mitigating the risks associated with how accessible your OT assets are to external or adjacent networks. The principle is built around a straightforw...
InfoSec Made Easy OT Security Leadership | NCSC Guidance Series Why every OT connectivity decision must start with a formal risk conversation — not a technical one There is a moment that every security leader in an operational technology environment eventually faces. A business leader walks in with a compelling case: real-time analytics, remote monitoring, predictive maintenance, integration with the enterprise data platform. The benefits are real, the pressure is genuine, and the timeline is already set. The question that lands on your desk is not "should we connect this?" — it has already been decided. The question is "how do we connect this?" That moment is exactly where Principle 1 of the NCSC's Secure Connectivity Principles for Operational Technology is designed to intervene. The principle is deceptively simple: before you design, before you architect, before you choose a vendor or write a firewall rule, you must be equipped to ma...