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From: Oscar <oxxxxxxxxxxxs@gmail.com>
Newsgroups: sci.crypt
Subject: Re: Memorizing a 128 bit / 256 bit hex key
Date: Wed, 19 Jun 2024 22:52:01 +0200
Organization: A noiseless patient Spider
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Op 18-6-2024 om 15:55 schreef Stefan Claas:
> You thoughts please, gentlemen.
> 
> Let's say you travel and do not want to store your secret hex key on your
> device and recreate it from memory.
> 
> What do you think about this proposal?
> 
> $ printf '%x' $(date -u -d '1979-01-01 12:34:56' +%s) $(date ...) 4 or 8 times.
> 
> One has to remember only the dates (times are optional) and then simply run the
> one liner.
> 
> The encryption software can be downloaded when one arrives at his destination.
> 

Someone already mentioned using python hash functions, but perhaps;
sha1sum <some file on the device>

If you don't want to bring <some file> with you, you can download it later.

Or just make up some lengthy password and translate it manually to "hex 
digits" using "man ascii".

Or just try to remember some fun hexdigits literally like deadbeef, 
b000b5, caffee etc ..

Cheers,
Oscar