![]() ![]() Why is a Trusted Execution Environment more Trustworthy? This then ripples down to an assertion that the Trusted OS and Trusted Applications executing inside that space are more trustworthy. In the TEE it is used to imply that you may have a higher level of trust in validity, isolation and access control in items (assets) stored in this space, when compared to more general purpose software environments. There are many interpretations of what is meant by Trust. Figure 1 – TEE alongside traditional REE containing Rich OS Trust in a Trusted Execution Environment (TEE) Generally, the rest of the device hosts a feature Rich OS like Android™, and so is generically known in this context as the REE (Rich Operating System Execution Environment). Hence TEE stands for Trusted Execution Environment and to distinguish them from the uncertain nature of applications in the REE (REE? Wait a second…), applications in the TEE are known as Trusted Applications (TAs). What is a Trusted Execution Environment (TEE)?Ī Trusted Execution Environment (TEE) is an environment for executing code, in which those executing the code can have high levels of trust in the asset management of that surrounding environment because it can ignore threats from the “unknown” rest of the device i. To work around that issue, the Trusted Execution Environment (TEE) was developed by a consortium of concerned parties from network operators, through manufacturers, to OS vendors. The more software, the larger the number of places where there may be a security issue (a larger “ attack surface”) and the higher the likelihood that vulnerabilities will be found. With that ability to do many tasks comes masses of software. It is a superb device that can do hundreds of tasks that once upon a time you needed multiple devices to achieve… but therein lies a problem. What is wrong with my phone?Īt one level, nothing. A Trusted Execution Environment (TEE) is an environment for executing code, in which those executing the code can have high levels of trust in that surrounding environment, because it can ignore threats from the rest of the device. ![]()
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