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Nick Taylor Subscriber for Pomerium

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What is Zero Trust Security?

What is zero trust? I like to use an airport analogy to convey the concept.

Think about airport security. Traditional perimeter-based security, like a virtual private network (VPN), is like showing your ID to security, not your bags or anything else, and then you're in never to be checked again. You could walk to a gate and say you're the pilot. Not great, right?

The Foo Fighters as captains of an airplane

Zero Trust security takes a different approach - more like how airports actually work. No boarding pass? You'll need to verify who you are at the ticket counter first. Got your pass? Great, but it isn't a free pass to wander - it only works for your specific flight, at your specific gate, at the right time. This matches how an identity aware proxy works in Zero Trust security.

Let's take a look at a real world situation, production access. Just because you're an engineer doesn't mean you get 24/7 access to production. You might only get elevated permissions during your on-call shifts. So the context here isn't just who you are, but when you're allowed to access a resource.

Here's the big difference: old-school perimeter security is binary - you're either in or out. Zero Trust keeps asking:

  • Are you who you claim to be?
  • Are you where you're supposed to be?
  • Is this the right time for your access?
  • Does your current context justify this access level?

Zero Trust doesn't mean no trust - it's about being precise with access. Right person, right access, right time, right context.

Context matters and always be verifying.

Photo by Icarus Chu on Unsplash

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Peter Harrison

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