Key Manager HWIP Technical Specification



This document specifies the functionality of the OpenTitan key manager.


  • One-way key and identity (working) state hidden from software.
  • Version controlled identity and key generation.
  • Key generation for both software consumption and hardware sideload.
  • Support for DICE open profile.


The key manager implements the hardware component of the identities and root keys strategy of OpenTitan.

It enables the system to shield critical assets from software directly and provides a simple model for software to use derived key and identity outputs.