Architecture and Technical Details
A complete Microsoft-based Trusted Computing-enabled system will consist not only of software components developed by Microsoft but also of hardware components developed by the Trusted Computing Group. The majority of features introduced by NGSCB are heavily reliant on specialized hardware and so will not operate on PCs predating 2004.
In current Trusted Computing specifications, there are two hardware components; the Trusted Platform Module (TPM), which will provide secure storage of cryptographic keys and a secure cryptographic co-processor, and a curtained memory feature in the Central Processing Unit (CPU). In NGSCB, there are two software components, the Nexus, a security kernel that is part of the Operating System which provides a secure environment (Nexus mode) for trusted code to run in, and Nexus Computing Agents (NCAs), trusted modules which run in Nexus mode within NGSCB-enabled applications.
Read more about this topic: Next-Generation Secure Computing Base
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