Re: Using Diceware, BIP39 and leetspeak for Argon2id keys

Stefan Claas in sci.crypt:

regarding my previous thread about memorizing a 128/256 bit key,
I came up with the following idea to create Argon2id keys.
>
Now we only need to memorize our Diceware passphrase.
>
This task shoulb be carried out on an offline Computer.
>
I am using four Golang programs, called dwp (diceware passphrase),
dice2bip, leetspeak and argon2id, which you can find on my GitHub
page at:
>
https://github.com/stefanclaas/
>
Usage of leetspeak is optional.
>
First we start with dwp:
>
$ dwp -r 6 -d eff_large_wordlist.txt -p
Diceware number 1: 51534 - reselect
Diceware number 2: 25455 - envelope
Diceware number 3: 42252 - nuptials
Diceware number 4: 35561 - lapping
Diceware number 5: 26225 - expand
Diceware number 6: 24453 - earpiece
>
Complete passphrase: reselect envelope nuptials lapping expand earpiece

Calculated entropy: 77 Bits:

   number of positions: 30 (6 x 5)
   character pool: 1..6

| user15@o15:/tmp$ bc -lq
| 30 * l(6)/l(2)
| 77.54887502163468544431

Quote from <https://en.wikipedia.org/wiki/Diceware>:

| The level of unpredictability of a Diceware passphrase
| can be easily calculated: each word adds 12.9 bits of
| entropy to the passphrase [...]. Originally, in 1995,
| Diceware creator Arnold Reinhold considered five words
| (64.6 bits) the minimal length needed by average users.
| However, in 2014 Reinhold started recommending that at
| least six words (77.5 bits) be used.

[...]

Our final result: b3ff9d34181c4771dd9ec993c78b2d5b2cc809024c9447f97468893f0d70e611

This result has an entropy of 77 Bits, too. IMHO.

Not 256 Bits, as you might think, as reshaping doesn't
add any amount of entropy, AFAIR.

Marcel                                                       (Lines: 63)
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