I mean protection for the data transferred between components on a PCB, against access from someone who has physical access to the board. As an example, there is a data bus between the baseband and a FPGA.
Is there a method to prevent someone who has access to the board, from reading the data on that bus using a scope?
Thanks for your assistance.
Vib
You have three not very good options.
(1) You can encript the data if it is digital. This adds a bunch of electronics to the two ends of the path.
(2) You can make the meaning of the signal so obscure that no-one ever figures out how to decode it. This very hard to do because 6 billion people are working agaisnt you.
(3) You can use "quantum encription". Basically you send the data with a very poor SNR and lots of error correction codes and require that the error rate remain in the predicted band. This can be very secure but it requires a two way connection and is slow to get the data through.
ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.