Asserting physical presence to a trusted platform module by physically connecting or disconnecting a hot pluggable device

摘要

A method includes asserting a physical presence signal to a trusted platform module of a compute node in response to detecting a change in the physical connection of a hot pluggable device to a port of the compute node. The change in the physical connection of the hot pluggable device to the port is selected from physically connecting the hot pluggable device to the port, physically disconnecting the hot pluggable device from the port, and combinations thereof. Optionally, the compute node has a USB port and the hot pluggable device has a USB connector that is selectively physically connectable to the USB port. In one example, detecting a change in the physical connection of the hot pluggable device to the compute node includes detecting a voltage change on the USB port.