BIOS security analysis and a kind of trusted BIOS

Authors:
ZhenLiu Zhou;RongSheng Xu
Affiliations:
Network Security Laboratory of High Energy Physics, CAS, China;Network Security Laboratory of High Energy Physics, CAS, China
Venue:
ICICS'07 Proceedings of the 9th international conference on Information and communications security
Year:
2007

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Abstract

The BIOS's security threats to computer system are analyzed and security requirements for firmware BIOS are summarized in this paper. Through discussion about TCG's trust transitivity, a new approach about CRTM implementation based on BIOS is developed. In this paper, we also put forward a new trusted BIOS architecture-UTBIOS which is built on Intel Framework for EFI/UEFI. The trustworthiness of UTBIOS is based on trusted hardware TPM. In UTBIOS, trust encapsulation and trust measurement are used to construct pre-OS trust chain. Performance of trust measurement is also analyzed in the end.