Modern iOS Security Features – A Deep Dive into SPTM, TXM, and Exclaves

The article delves into modern iOS security features like SPTM, TXM, and Exclaves, focusing on the XNU kernel's evolution towards a more compartmentalized and secure architecture. SPTM introduces trust domains into the system, enhancing security by segregating functionalities. TXM handles code signing and entitlement verification, while Exclaves, a recent security feature, isolates key components from direct kernel access. These architectural changes aim to mitigate the impact of a kernel compromise, bolstering overall system security.