In this article, we will explore in more detail what TEE is, how it works, and how Secret Network has led the way in bringing this technology to light. (to recap, part i is here)
Lisa Loud explains:
What is a Trusted Execution Environment (TEE)?
A Trusted Execution Environment (TEE) is an area on the main processor of a device that is separated from the system’s main operating system (OS). It’s designed to keep data safe, making sure that anything stored, processed, or used inside this area is secure from outside threats. TEEs create a secure environment for sensitive applications by using advanced encryption and security techniques, ensuring that data remains private, authentic, and protected.
As our need for digital security increases, TEEs have become more important, and they’re no longer just for high-end technology. You can find TEEs in many everyday devices like smartphones, tablets, and even in systems like smart TVs. They are also used in industries like automotive and healthcare, where secure processing is crucial.
TEEs work alongside the regular operating system, combining hardware and software to provide a level of security that goes beyond what the standard processing environment offers. This makes them a reliable solution for protecting sensitive information in today’s digital world.
How does the Trusted Execution Environment work?
Even though a TEE is isolated from the rest of the device, a trusted application that runs in a TEE will typically have access to the full power available of a device’s processor and memory. A TEE is also designed to only run code that has been pre-approved, ensuring that no unauthorized software can get in.
How is TEE isolated? On a hardware level, TEE architecture is similar to the way your Web3 wallet works — external access to an area of the processor is protected by a set of private keys. Just as only you can approve transactions with a unique private key that no one else has, only trusted applications can access this area and execute code within it. So, TEE is a part of the processor that no unauthorized application can access or even peek into — unauthorized apps can’t even detect that this secure area exists.
The way a TEE is set up can vary depending on what it’s used for, like mobile payments, digital identities, or protecting content. However, the core principles remain the same: trust, security, and keeping sensitive data isolated.
Although a secure element requires no industry standards, TEEs do follow a set of standards. These standards help manage multiple remote devices simultaneously, covering things like encryption, end-to-end security, and application management. Many companies — from service providers to device manufacturers — are working together to standardize TEEs.
TEEs are also designed so that different remote managers can control specific applications without interfering with others. For instance, a device manufacturer and a bank could both manage their own applications in the TEE, but neither could affect the other’s programs.
