AMD, Google, Microsoft & NVIDIA Announce "Caliptra" Open-Source Silicon Root of Trust (RoT)

guest · Oct 18, 2022

by Michael Larabel @michaellarabel - October 18, 2022

AMD, Google, Microsoft, and NVIDIA have used this week's OCP Global Summit to announce Caliptra as their open specification for a silicon Root-of-Trust (ROT) to be found with future CPUs / SoCs, GPUs, NICs, SSDs, and other hardware components.
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Caliptra is the multi-vendor effort being announced today to provide a silicon root-of-trust for various components. The open-specification provides a reusable, silicon-level IP block for integration in SoCs and other ASICs. Caliptra is fully open-source down to the RTL being made public along with the firmware.

Caliptra can provide verifiable cryptographic assurances of the SoC security configuration and ensuring the boot code is trusted. Caliptra is designed to be fully integrated into the SoC/ASIC to provide integrated security compared to separate Root-of-Trust solutions today.
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Caliptra's specification is fully open and can already be found on OpenCompute.org. Those are the brief details shared in advance about Caliptra while more technical information will be presented at this week's Open Compute Project (OCP) event.
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Open Compute Project
Caliptra: A Datacenter System on a Chip (SOC) Root of Trust (RoT)
(PDF): https://www.opencompute.org/documents/caliptra-silicon-rot-services-09012022-pdf

Caliptra defines a design standard for a Silicon internal RoT baseline. The standard satisfies a Root of Trust for Measurement (RTM) role. The open-source implementation of Caliptra drives transparency into the RTM and measurement mechanism that anchors hardware attestation. The Caliptra Silicon RoT must boot the SoC, measure the mutable code it loads, and measure and control mutation of non-volatile configuration bits in the SoC.

The Caliptra Silicon RoT reports these measurements with signed attestations rooted in unique per-asset cryptographic entropy. As such, the Caliptra Silicon RoT serves as a Root of Trust for Identity for the SoC.
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AMD, Google, Microsoft & NVIDIA Announce "Caliptra" Open-Source Silicon Root of Trust (RoT)

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AMD, Google, Microsoft & NVIDIA Announce "Caliptra" Open-Source Silicon Root of Trust (RoT)

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