Updating a trusted device by booting update software and downloading the update over a network

摘要

A user trusted device 10 is connected to a host computer 101 and the host computer is booted from the device. The boot firmware 122 of the computer detects that the device contains a bootable partition and loads the update software from the device into the computer memory 121. The update software transfers an update for the software on the device from a network server 30 to the computer and updates the software in the device. The update software may use the network interface 124 in the host computer if the device does not have a network interface. The device may have a secure memory and a non-secure memory. The non-secure memory may be encrypted using a key stored in the secure memory.