Caliptra
An open-source silicon root-of-trust block letting chips verify their own firmware, backed by OCP and hyperscalers.
Current numbers
4 contributorsCaliptra open silicon RoT, co-developed by Microsoft, Google, AMD and NVIDIA; AMD plans to integrate it from 2026+ products
Caliptra 2.1: ML-DSA + ML-KEMCaliptra 2.1 reference IP supports ML-DSA and ML-KEM; verify selected options in the shipped device