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From: Rich <rich@example.invalid>
Newsgroups: sci.crypt
Subject: Re: Using Diceware, BIP39 and leetspeak for Argon2id keys
Date: Sun, 18 Aug 2024 17:32:07 -0000 (UTC)
Organization: A noiseless patient Spider
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References: <fe80a8e31f3560eaa056f683595dcccfb8a8f8a7@i2pn2.org>
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Stefan Claas <pollux@tilde.club> wrote:
> $ argon2id -p \
  "project clock spirit taste shoulder trumpet what system radio boat local sock pond gauge cancel hundred" \
 -s "4nnu41 u61y fu31 v01d 3x3cu73 54u5463 4n613 kn33"
> 
> ...
> 
> So, all in all, we only have to remember the Diceware passphrase to reconstruct
> our encryption  key.

I suggest you perform a test.

Today, attempt to memorize your dicewords/leetspeek example above.

Then, wait seven days.

Then, try to regurgitate it (without cheating) and see how well you did.

Then, wait fourteen days.

Repeat trying to remember it (without cheating).

Continue with longer intervals at your pleasure.

I predict that you will find it difficult to remember those random word 
sententes after only a short timeframe, likely somewhere on the order 
of 7-28 days.