2 ms·
> Generating signing key is not really an option as you won't get enough entropy on the ECU and generated private keys will be oscillating around small group of
by labcomputer 3y ago
> Generating signing key is not really an option as you won't get enough entropy on the ECU and generated private keys will be oscillating around small group of prime numbers.
Erm... using the LSB of a network RX timer is common way to add entropy (and perfectly feasible here). You could also use the LSB of the +voltage rail sense or the thermometer that probably exists on your MCU.