What is the Zero Trust Model (ZTM)


The Zero Trust Model of information security simplifies how information security is conceptualized by assuming there are no longer “trusted” interfaces, applications, traffic, networks, or users. It takes the old model— “trust but verify”—and inverts it, because recent breaches have proven that when an organization trusts, it doesn’t verify [6].

This model requires that the following rules be followed [6]:

All resources must be accessed in a secure manner.
Access control must be on a need-to-know basis and strictly enforced.
Systems must verify and never trust.
All traffic must be inspected, logged, and reviewed.
Systems must be designed from the inside out instead of the outside in.

The zero-trust model has three key concepts:


Ensure all resources are accessed securely regardless of location.
Adopt a least privilege strategy and strictly enforce access control.
Inspect and log all traffic.

“Outside-In” to “Inside-Out” Attacks

According to a Forrester Research report, information security professionals should readjust some widely held views on how to combat cyber risks. Security professionals emphasize strengthening the network perimeter, the report states, but evolving threats—such as increasing misuse of employee passwords and targeted attacks—mean executives need to start buffering internal networks. In the zero-trust security model, companies should also analyze employee access and internal network traffic. One major recommendation of …

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