If you do not trust any software random number generator due to possible bugs or
backdoors, you can generate a mnemonic code using dice yourself.
Critical to security is the use of random numbers.
Do not try to select words from the mnemonic dictionary in other ways. Even if
it
seems to you that you are unpredictably doing this, most likely you are
mistaken.
In the proposed generation scheme, it is most convenient to use 5 cubes at a
time.
If you have only 1 die, you should make 5 consecutive throws to generate 1 word.
With manual code
generation, it is not possible
to calculate the checksum, which is written at the end in accordance with BIP39.
If
the
wallet in which you plan
to use your mnemonic code requires the correct code checksum, then you should
adjust
last word to correct
checksum with mnemonic code loader tool.
You should select 12 / 15 / 18 / 21 or 24
(recommended)
words using dice rolls and dice wordlist. If your
throw result is not on the list, just ignore and continue. Some combinations are
excluded for the uniform probability distribution.