Internet of Things

Signed Firmware

The approach which we just discussed above can also be used for firmware images and secure

boot. Such a signature makes sure that only an authorized machine or user marks a firmware

prior to execution. This makes it tougher for hackers to create rogue firmware and infect a

system—since there is no chance that they could sign the code which was created by them.

Secure boot is a functionality which leverages this electronic signature. It makes sure all

the code which is defined be run on a machine is signed appropriately. After the booting pro-

cess, the device’s initial bits run and can process the verification of the electronic signature. ...