I would seriously advise anybody from using this device. Designing a hardware true random number generator takes a lot of effort that this design is evidently lacking. For example, there is no whitening whatsoever. Even worse, the firmware includes a line of code that ensures that the "RNG" never outputs the same "random" number twice in a row.
Also, usually HW RNGs include a firmware module that is constantly monitoring the entropy output and shutting off the generator in case of it sinking below a certain threshold to detect hardware failure and prevent it from causing predictable output.
Some more information on this subject can be found at Wikipedia: https://en.wikipedia.org/wiki/Hardware_random_number_generat...
I do not want to discourage anybody from working on such things. I think this is a nice project idea and a very good opportunity to learn a lot about random numbers. Please, though, always put a big warning on any crypto things you designed youself and do not present them as a finished product.
Also, usually HW RNGs include a firmware module that is constantly monitoring the entropy output and shutting off the generator in case of it sinking below a certain threshold to detect hardware failure and prevent it from causing predictable output.
Some more information on this subject can be found at Wikipedia: https://en.wikipedia.org/wiki/Hardware_random_number_generat... I do not want to discourage anybody from working on such things. I think this is a nice project idea and a very good opportunity to learn a lot about random numbers. Please, though, always put a big warning on any crypto things you designed youself and do not present them as a finished product.
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