The Pixel 8's Tensor G3 chip pairs with an upgraded Titan M2 security coprocessor to isolate sensitive cryptographic operations, while introducing Memory Tagging Extension (MTE) support for runtime detection of memory corruption vulnerabilities and significantly hardening the cellular baseband firmware with bounds sanitizers, integer overflow protection, stack canaries, and control flow integrity to reduce what has historically been a major attack surface. That's a major improvement compared to the 7 or earlier generations.