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Home ยป fTPM: A Software-Only Implementation of a TPM Chip
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fTPM: A Software-Only Implementation of a TPM Chip

Authors: 

Himanshu Raj, ContainerX; Stefan Saroiu, Alec Wolman, Ronald Aigner, Jeremiah Cox, Paul England, Chris Fenner, Kinshuman Kinshumann, Jork Loeser, Dennis Mattoon, Magnus Nystrom, David Robinson, Rob Spiger, Stefan Thom, and David Wooten, Microsoft

Abstract: 

Commodity CPU architectures, such as ARM and Intel CPUs, have started to offer trusted computing features in their CPUs aimed at displacing dedicated trusted hardware. Unfortunately, these CPU architectures raise serious challenges to building trusted systems because they omit providing secure resources outside the CPU perimeter.

This paper shows how to overcome these challenges to build software systems with security guarantees similar to those of dedicated trusted hardware. We present the design and implementation of a firmware-based TPM 2.0 (fTPM) leveraging ARM TrustZone. Our fTPM is the reference implementation of a TPM 2.0 used in millions of mobile devices. We also describe a set of mechanisms needed for the fTPM that can be useful for building more sophisticated trusted applications beyond just a TPM.

Himanshu Raj, ContainerX

Stefan Saroiu, Microsoft

Alec Wolman, Microsoft

Ronald Aigner, Microsoft

Jeremiah Cox, Microsoft

Paul England, Microsoft

Chris Fenner, Microsoft

Kinshuman Kinshumann, Microsoft

Jork Loeser, Microsoft

Dennis Mattoon, Microsoft

Magnus Nystrom, Microsoft

David Robinson, Microsoft

Rob Spiger, Microsoft

Stefan Thom, Microsoft

David Wooten, Microsoft

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