I can change it whenever I want, but I don't want to wait 2+ weeks again nor to pay 20+ EUR for a case. The one I have does the job nevertheless. No, I don't have a 3D printer.
Dude, you can print the case anywhere you want in your local area for few bucks
![Cheesy](https://bitcointalk.org/Smileys/default/cheesy.gif)
I am sure you can find bunch of ads from people and services who are offering 3d printing services, most I know are 3d designers or just owners of 3d printers.
They don't even know what they are printing when I order it from them, it's dirt cheap and I don't have to wait more than few hours or a day for delivery.
BlackHatCoiner, I don't know where you're located, but I can print something like this for free for you mate.
![Smiley](https://bitcointalk.org/Smileys/default/smiley.gif)
Even made a topic about this after joining the forum. I don't operate the machines anymore lately, but I can fire them up if needed.
[...]
It's simple math, and if you are not mathematician you can't understand it easily.
Companies wouldn't waste millions of dollars to achieve true randomness if gameboy, nintendo or raspberry pi was able to achieve this.
Research this subject deeper to understand it better, key point is if something can be reproduced or not.
Actually it seems he did his research and apparently the Linux kernel does use external sources of entropy nowadays; which would mean the gap between PRNG and TRNG is closing a bit.
But when you get into very large or very small numbers (or probabilities in this case), they get extremely hard to imagine.
I like these types of videos to better envision them:
https://www.youtube.com/watch?v=tnIFQIu3tZ0A little off-topic, but this one is about the security of 256-bit:
https://www.youtube.com/watch?v=S9JGmA5_unYAnd of course the well-known dyson sphere infographic:
![](https://ip.bitcointalk.org/?u=https%3A%2F%2Fi.postimg.cc%2FR0WYRjhy%2Fimage.jpg&t=665&c=zXWhf6-fLbDayQ)
What I'm trying to say is that in the field of such large / small numbers, even pretty large factors may not make a large practical difference.
For example, an entropy multiple orders of magnitude worse than another one, can be practically just as secure, while mathematically and information-theoretically being a lot worse.
That's why sometimes (also in this thread) statements are made about software randomness being 'very bad entropy' or similar, even though it may still be totally viable for many applications. It's just 'terrible' in information theory / maths realms.
![Wink](https://bitcointalk.org/Smileys/default/wink.gif)