The boot process begins with on-chip ROM code (immutable). The ROM verifies the Pre-Boot Loader (PBL) or Secondary Pre-Boot Loader (SPBL) through digital signatures (RSA or ECDSA). The TA 2.1 user guide details:
TA 2.1 introduces the and strict version control mechanisms. qoriq trust architecture 21 user guide
| Feature | TA 2.0 | TA 2.1 | TA 3.0 (ARMv8-M) | |---------|--------|--------|------------------| | Secure Boot | Yes | Yes | Yes | | Run-Time Check | No | Yes | Enhanced | | Anti-Rollback | Limited | Monotonic counters | Fuse-based versioning | | Debug Security | Basic password | Challenge-response | Authentication with nonce | The boot process begins with on-chip ROM code (immutable)
