So if I multiply the 62 numbers together, would that work?
But if I add them together , won't that create a very weak key, a small number that is still in the range of computers that go through addresses 1 by 1? So isn't it important to have the key at the higher ends of the randomness.
No, multiplying the numbers would destroy the informational entropy, you should string them together and take a hash of the string (SHA3-256 for example).
Perhaps take a photograph of the dice and then calculate the SHA-256 hash of the photo file?
That would depend on the randomness of the picture, and how random the bits are in the picture, which might not be that random.
So if I multiply the 62 numbers together, would that work?
But if I add them together , won't that create a very weak key, a small number that is still in the range of computers that go through addresses 1 by 1? So isn't it important to have the key at the higher ends of the randomness.
No, multiplying the numbers would destroy the informational entropy, you should string them together and take a hash of the string (SHA3-256 for example).
Doesn't the SHA256 function cut off entropy too? Or is it just the entropy beyond the 256 bits?
For example SHA256 has only 128 bits of security, should I use SHA-512 for this, wouldn't SHA256 cut off the entropy into half?