Apple made changes to its A12, A13, and S5 system-on-chips to alter the Secure Enclave in Fall 2020, to include a second-generation model of the Secure Enclave.
Whenever Apple introduces new features to its chips, it typically does so as part of a number of other updates included in a new chip release. While unlikely to occur on pre-existing chips normally, it appears that Apple has adjusted some of the designs of its earlier SoCs to make them more secure.
MacRumors, a PDF version of the guide includes a table showing the feature summaries of the Secure Enclave, with changes that occurred in fall 2020. The Secure Enclave is used to store highly sensitive details relating to security, such as Face ID or Touch ID data, instead of handing off that work to the application processor.
Apple quietly upgraded the Secure Enclave for older chips in fall 2020 - iPhone Discussions on AppleInsider Forums
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SAN FRANCISCO, CA - JUNE 11: Apple CEO Tim Cook delivers the keynote address at the Apple 2012 World Wide Developers Conference (WWDC) at Moscone West on June 11, 2012 in San Francisco, California. Apple unveiled a slew of new hardware and software updates at the company s annual developer conference which runs through June 15.
Previously, Apple was reportedly integrating new security features such as opening the iPhone using Apple Watch and a new anti-tracking feature in its upcoming iOS 14.5 updates. And now, Apple wants to reiterate some reasons why its device systems are still better compared to those offered by Google.