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From: Peter Fairbrother <peter@tsto.co.uk>
Newsgroups: sci.crypt
Subject: Re: Memorizing a 128 bit / 256 bit hex key
Date: Wed, 19 Jun 2024 20:57:59 +0100
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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