How does UDPi protect devices against die slicing?
UDPi does not prevent access to the core, but rather prevents the ability to use the information invaders access. This results in a different approach than other protection methods offer. Other methods try to block access to the internal information at different levels. UDPi encodes information in the processor so even if the die is accessed, the information will be useless since it is meant to work only on one specific processor. The best implementation of UDPi to protect against die slicing is to make the protection part of the CPU core as much as possible, so even when analyzing the die, there are no clues as to where the protection algorithm lies within.
