Re: Memorizing a 128 bit / 256 bit hex key

On 18/06/2024 15:05, Stefan Claas wrote:

Stefan Claas wrote:
 

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.

 And use that as a seed for Argon2id key creation.

But Izvestia! Izvestia said: (Russian double-talk) It stinks.
Entropy is considerably lower than 128 bits, probably around 30 bits at a swag..
Peter Fairbrother