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By Gerard Salton
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This measurement list serves to capture sufficiently detailed metadata about measured entities to enable the verifier to make sense of them. Exactly what this list contains is implementation-specific. Marchesini et al. , kernel) , while IBM’s Integrity Measurement Architecture contains the hash and full path to a loaded executable, and recursively measures all dynamic library dependencies . To check the accuracy of the measurement list, the verifier computes the hash aggregate that would have been generated by the measurement list and compares it to the aggregate signed by the TPM Quote.
Consider a similar challenge in establishing a secure channel between a client system and an isolated execution environment on a server [130, 131]. , extend the public key into one of the TPM’s PCRs. Goldman et al. also discuss other more efficient solutions in the context of a virtualized environment. 3 Privacy Concerns Participating in an attestation protocol conveys to the verifier detailed information about the software loaded for execution on a particular platform. Furthermore, the attestation often depends on a cryptographic key embedded in the secure hardware, and using the same key in multiple attestations allows those attestations to be linked together.
AMD refers to the memory at this address as the Secure Loader Block (SLB). The first two words (16-bit values) of the SLB are defined to be its length and entry point (both must be between 0 and 64 KB). To protect the SLB launch against software attacks, the processor includes a number of hardware protections. When the processor executes an SKINIT instruction, it disables DMA to the physical memory pages comprising the SLB by setting the relevant bits in the system’s Device Exclusion Vector (DEV).