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Thursday, October 29 • 14:40 - 15:25
Introducing TPM NV Storage with E/A Policies and TSS-FAPI - Andreas Fuchs, Fraunhofer SIT

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The TPM contains two major features; a certain amount of NV memory and the so-called Enhanced Authorization framework. The former can be configured as simple storage, but also as monotonic counter, or bitfield. The latter can be used to implement fine-grained access policies for access TPM objects, such as NV memory. This presentation will give an introduction into these concepts and demonstrates how the features of TPM NV and E/A policies can easily be used via the TPM Software Stacks's (TSS) Feature API (FAPI). This API includes a declarative language and processing engine for TPM E/A policies which for the first time make their use very easy. In order to illustrate their usefulness, a set of example use cases and configurations, such as WriteOnceReadMany (WORM) storage (for device serial numbers) or role-based access on a per-operation level for NV storage will be presented.

Speakers
AF

Andreas Fuchs

Head of Trustworthy Platform, Fraunhofer SIT
Andreas Fuchs is a TPM and OpenSource enthusiast involved with TCG. He is a maintainer of the OpenSource TPM Software Stack (TSS) 2.0, the tpm2tss OpenSSL engine and the tpm2-totp project. Andreas Fuchs studied computer science at the Technische Universität Darmstadt and the University... Read More →



Thursday October 29, 2020 14:40 - 15:25 GMT
LSS Theater
  Linux Security Summit (LSS)