I am using custom hardware on which i'm using the random noise from an ADC converter and a few other seeds. I combine these in an algorithm and have tested it against FIPS PUB 140-2 for a random number generator. It has passed the test but I'm reading up on RNG attacks and do not fully understand these attacks.
If people would mess with my seeds is there anything i could do against it? the hardware is in an insecure environment so if an attack would go through the trouble of opening it, finding the sources and so on, there is nothing i can do against it is there?
Is there anything you can do to make your RNG secure other than choosing multiple seeds?