Terminologies

SMX

The SMX (Safer Mode Extension) are the processor’s programming interface in an Intel TXT platform.

CE

The controlling environment is provided by system software such as an OS kernel or Virtual Machine Manager (VMM).

MLE

The software launched using the SMX instructions is known as the Measured Launched Environment (MLE). According to the definition, BIOS is included indeed.

Measurement

The object of a measurement is a software.

Measuring software involves processing the executable such that the result (a) is unique and (b) indicates changes in the executable. A cryptographic hash algorithm meets these needs.

DR

静态信任根（static Root of trust）

动态信任根（dynamic Root of trust）

Motivation

A central objective of the Intel® TXT platform is to provide a measurement of the launched execution environment.