In the high level block diagram of a PCB used in a TV set top box the Digital Right Management (DRM) key is stored in a non-volatile memory (NVM) which goes to a comparator that generates the channel grant access signal. Describe a possible tampering attack that can bypass this protection. You can update the drawing to illustrate your attack. You need to incorporate your attack within the dotted box.
- What would be a possible solution to protect against the aforementioned tampering attacks?
- What is PCB reverse engineering?