Importance

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Abstract

Messages, including messages in conformance with various protocols, can be hashed and the hash values added to an event log and provided to a Trusted Platform Module (TPM), which can extend one or more Platform Configuration Registers (PCRs) with the hash value, much as it would with the hash of a component that was installed or executed on the computing device with the TPM. Subsequently, the TPM can sign one or more of the PCRs and the signed PCRs can be transmitted, together with the event log and a copy of the messages. The recipient can verify the sender based on the signed PCRs, can confirm that the signed PCRs match the event log, and can verify the hash of the message in the event log by independently hashing it. In another embodiment, an intermediate hashing of the message can avoid transmission of potentially malicious executable instructions within a message.

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First Claim