Research and Implementation of Trusted BIOS Based on UEFI
XU Rong-sheng · Jisuanji gongcheng · 2008
This paper analyzes security threats of firmware BIOS,and defines the concept of trusted BIOS.The architecture of UTBIOS,which is based on UEFI specification and trusted computing mechanism,is developed.To construct Pre-OS chain of trust,CRTM embedded in UTBIOS is used to measure the trustworthiness of entities in different phases of bootstrap.Implementation of UTBIOS based on UEFI BIOS product is described and the performance of trusted measurement is analyzed.