# ARM CC The Armv9 architecture is poised to introduce a novel secure execution environment known as Realms. Realms requires only minimal adjustments to the hardware and heavily relies on firmware for its functionalities. This design allows existing applications to continue functioning without modification, while benefiting from heightened security. Within this section, we delve into the inner workings of Realms. We explore how the correctness of the firmware was established through the application of the Coq proof assistant. Additionally, we present performance benchmarks that compare the efficiency of Realms and outline key distinctions between Realms and established secure enclaves. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.enclaive.cloud/confidential-cloud/technology-in-depth/arm-cc.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.