6.1TPM架构 家北大学 Northeastern University Execution Engine The execution engine runs program code.It performs TPM initialization and measurement taking. Platform Configuration Registers(PCR) A PCR is a 160-bit/20-byte storage location which is used to store integrity measurements. Whether a PCR must be used to store a specific measurement (e.g.the CRTM,BlOS...Option ROM code...),or,whether it is available for general use,is specified in platform specific specifications.6.1 TPM 架构 ⚫ Execution Engine ❖ The execution engine runs program code. It performs TPM initialization and measurement taking. ⚫ Platform Configuration Registers (PCR) ❖ A PCR is a 160-bit/20-byte storage location which is used to store integrity measurements. ❖ Whether a PCR must be used to store a specific measurement (e.g. the CRTM, BIOS…Option ROM code…), or, whether it is available for general use, is specified in platform specific specifications