In autumn 2020, Apple has made some unusual hardware modifications of half production to a12, a13 and s5 processors in its devices to update the secure storage component. According to an apple support page, in fact, the company updated the secure enclave in a series of chips produced in autumn 2020:secure enclave is a security coprocessor that includes a hardware-based key manager isolated from the main processor to provide an additional layer of security. Secure enclave is a hardware feature on certain versions of iphone, ipad, mac, apple tv, apple watch and homepod, i.e.

Secure enclave also retains the integrity of coding operations even when the device kernel has been compromised. Communication between secure enclave and the application processor is strongly controlled through its isolation in an interrupt-driven mailbox and shared memory data buffer.