Security and privacy of iOS
security and privacy features of the iOS operating system
The iOS operating system uses many security features in both hardware and software, from the boot process to biometrics.
Secure Boot
Before fully booting into iOS, there is low-level code that runs from the Boot ROM. Its task is to verify that the Low-Level Bootloader is signed by the Apple Root CA public key before running it. This process is to ensure that no malicious or otherwise unauthorized software can be run on an iOS device. After the Low-Level Bootloader finishes its tasks, it runs the higher level bootloader, known as iBoot. If all goes well, iBoot will then proceed to load the iOS kernel as well as the rest of the operating system.
Secure Enclave
The Secure Enclave is a coprocessor found in iOS devices part of the A7 and newer chips used for data protection. It includes the user data pertaining to Touch ID, Face ID, and Apple Pay, among other sensitive data. The purpose of the Secure Enclave is to handle keys and other info such as biometrics that is sensitive enough to not be handled by the Application Processor (AP). It is isolated with a hardware filter so the AP cannot access it. It shares RAM with the AP, but its portion of the RAM (known as TZ0) is encrypted.
The public source identifies “Security and privacy of iOS” as security and privacy features of the iOS operating system. This brief keeps that definition visible, then builds a research path around Security, privacy and security.
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Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Sep 18, 2026. The linked authority identifier is Q125030434. None of the 0 selected statements returned an explicit reference.
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This entry incorporates text from “Security and privacy of iOS” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.