Verified or Assumed? — TechKnowSurge

About this interactive

The zero trust principle is never trust, always verify. A traditional network works like a club bouncer: your ID is checked at the door, and once you are inside nobody checks it again. A device that connects to the internal network is trusted because it is inside, and a user who signed in this morning keeps what the morning's sign-in gave them. Zero trust drops that assumption, because things change after the door. Someone plugs in who should not be there; a machine that was clean gets infected; Juan is promoted from Sales to Management at noon. So every request is checked, continuously: who is asking, what they are allowed now, and whether the device is healthy and up to date. In the lesson's Windows example, the token Juan got at sign-in kept his Sales access until he signed out; under zero trust his next request to Sales is checked against his new role and refused. The tell is what the access rests on. If it rests on location (inside the network) or on a check that happened once, it is implicit trust. If it is re-checked on each request, it is zero trust.

What you'll learn

Tell a zero trust practice (never trust, always verify: each request checked against current identity, role and device state) from a perimeter practice that trusts a user or device because it is already inside the network or already signed in
Explain why continuous verification matters beyond the network, as in the lesson's case of a promoted employee whose sign-in token kept access he no longer needed

Aligned to

CompTIA Security+

1.2 Summarize fundamental security concepts.

3.1 Compare and contrast security implications of different architecture models.

Key terms

Zero Trust: A security model that assumes no user or device is trusted by default and requires continuous verification.
Continuous Verification: The ongoing, repeated process of authenticating and authorizing users and devices each time they request access to a resource, rather than only at initial login.
Implicit Trust Zone: A designated network segment where connected devices are granted access without undergoing the continuous verification checks required in a zero trust model.
Network Perimeter: The boundary of a network that separates internal trusted resources from external untrusted networks, defined by its entry and exit points.
Authentication: The process of verifying the identity of a user, device, or system.
Authorization: The process of determining what actions or resources an authenticated user is permitted to access.

Topics

Zero Trust Continuous Verification Implicit Trust Perimeter Security Interactive Categorize

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