Purdue vs Zero Trust in OT security

The Purdue Model has long served as a foundation for securing OT environments, but its limitations in addressing modern cyber threats are evident. Zero Trust enhances OT security by enforcing strict access controls, continuous monitoring, and micro-segmentation.

Trust people, not packets

Let’s clear something up right away: Zero Trust does not mean we don’t trust people. It means we don’t blindly trust the digital traffic moving through our networks. And yes, that distinction matters, a lot.

An image showing the title of the blog (Zero Trust: A New Year's resolution worth keeping) as well as an image of a list of 2025 resolutions.

Zero Trust: A New Year’s resolution worth keeping

As the year draws to a close, it’s time to reflect on the past 12 months and make plans for the year ahead. For those of us in cybersecurity, the question is clear: what did we do to strengthen our security posture this year, and how can we do even better next year?

Optimism bias won’t save you

With cybersecurity still a hot topic, news alerts about the latest data breach or security incident are hard to miss. Yet, even whilst being bombarded with these types of news items, many companies still think that they’re somehow immune to such threats.

This optimism bias tends to come in three different flavors.