Integrity Management Infrastructure for Trusted Computing

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Computer security concerns have been rapidly increasing because of repeated security breaches and leakages of sensitive personal information. Such security breaches are mainly caused by an inappropriate management of the PCs, so maintaining integrity of the platform configuration is essential, and, verifying the integrity of the computer platform and software becomes more significant. To address these problems, the Trusted Computing Group (TCG) has developed various specifications that are used to measure the integrity of the platform based on hardware trust. In the trusted computing technology, the integrity data of each component running on the platform is recorded in the security chip and they are securely checked by a remote attestation. The infrastructure working group in the TCG is trying to define an Integrity Management Infrastructure in which the Platform Trust Services (PTS) is a new key component which deals with an Integrity Report. When we use the PTS in the target platform, it is a service component that collects and measures the runtime integrity of the target platform in a secure way. The PTS can also be used to validate the Integrity Reports. We introduce the notion of the Platform Validation Authority, a trusted third party, which verifies the composition of the integrity measurement of the target platform in the Integrity Reports. The Platform Validation Authority complements the role of the current Certificate Authority in the Public Key Infrastructure which attests to the integrity of the user identity as well as to related artifacts such as digital signatures. In this paper, we cover the research topics in this new area, the relevant technologies and open issues of the trusted computing, and the detail of our PTS implementation.

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