What is the name of the hardware security element in iPhones?

What is the name of the hardware security element in iPhones? The answer is Secure Enclave.

Secure Enclave is Apple's isolated security subsystem for protecting especially sensitive information. On newer Apple devices, it is implemented as a dedicated Secure Enclave Processor, or SEP, within the device's system-on-chip rather than as a user-replaceable module.

It handles functions involving cryptographic keys, device security, and biometric authentication data from Touch ID or Face ID. Apple designed it so the main application processor cannot directly access the protected secrets it manages. Secure Enclave also has its own secure-boot process and a hardware random-number generator.

The technology first appeared with Apple's A7 chip generation in 2013. It is often confused with the T2 chip, but the T2 was a separate Apple security and controller chip used in some Macs. Likewise, TPM is a general industry term for a trusted platform module, not the name Apple uses for the iPhone security element.