Quote from: MrFreeDragon on October 12, 2019, 09:19:07 PM

Some weeks ago I made a visual tool to create a bitcoin private key. The most secure way for key generation is to flip a physical coin 256 times. I flipped a coin 256 times, and made a video how to create the bitcoin private key with my tool.

Here is the video instruction: https://youtu.be/WyBdYhwweaE

Such a techique is not equivalent of true random generator and all of the resulting keys shouldn't ever be trusted.

Quote from: Saint-loup on October 24, 2019, 12:44:33 PM

It's certainly not perfectly random but it's safer than relying on so called "True Random" Number Generators that can be bugged or having design weaknesses, and are actually just trustful blackboxes.

If you wish a guaranteed and independent entropy then you can buy any uranium mineral and use Geuger counter to make as many random bytes as you want.

I tried this and it worked very well.

https://www.youtube.com/watch?v=00h0_Tq8ThA
https://www.youtube.com/watch?v=vtk1o2Qc0u4
https://www.youtube.com/watch?v=pBdqaxtJFHQ
https://www.youtube.com/watch?v=bmK_MVnli7c

My source code is here:

https://github.com/CryptoManiac/rng

It works much faster than flipping the coins and provides a real, guaranteed and unconditioned security.