The Physical Presence Interface utilizes the industry-standard Advanced Configuration and Power Interface (ACPI) to provide a communication mechanism between the OS and the BIOS, enabling the OS and the BIOS to cooperate to provide a simple and straightforward platform user experience for administering the TPM without sacrificing security.
This Interface was designed under the assumption that TPM commands requiring physical presence should only be executable in the pre-OS environment. Given this constraint, the Physical Presence Interface eases administration by minimizing the need to understand and configure a platform’s BIOS — a significant deterrent to the mass deployment of trusted platforms, especially across heterogeneous platforms.
The implementation of the Physical Presence Interface is highly recommended for platforms that support the software method of asserting physical presence (as indicated by the physicalPresenceCMDEnable permanent flag of the TPM).
Membership in the Trusted Computing Group is your key to participating with fellow industry stakeholders in the quest to develop and promote trusted computing technologies.
Standards-based Trusted Computing technologies developed by TCG members now are deployed in enterprise systems, storage systems, networks, embedded systems, and mobile devices and can help secure cloud computing and virtualized systems.
Trusted Computing Group announced that its TPM 2.0 (Trusted Platform Module) Library Specification was approved as a formal international standard under ISO/IEC (the International Organization for Standardization and the International Electrotechnical Commission). TCG has 90+ specifications and guidance documents to help build a trusted computing environment.