[kroeckx]

I'm still not really convinced about how much entropy is collected by the jitter entropy technique. I've been looking at https://github.com/smuellerDD/jitterentropy-library previously, which is for instance used by OpenWRT. It's hard to do a proper estimation of the entropy, because depending on how you measure it, you get different results. The library has been changed, but it's probably still overestimating the entropy.