[Cryptography] Some quantum computers might need more power than supercomputers

Kent Borg kentborg at borg.org
Tue Jan 13 18:09:09 EST 2026


On 1/13/26 4:43 AM, Michael Kjörling wrote:
> True; but what I noted is orthogonal to backups. Backing up, say, the
> password database is a way to ensure that access to that encrypted
> password database is not lost; but it has no bearing on accessing the
> _contents_ of the database (assuming access to the ciphertext) as
> readable plain text. Having a defined way by which a specific other
> party can gain access to the_contents_ of a password database that
> this party_has_ access to is a related, but separate, problem.

Go ahead and say they are orthogonal, but both dimensions need to work 
in concert and have to be brought together in a coordinated way. Making 
sure heirs have a key is pretty worthless if they don't also have 
up-to-date data, and vice versa.

Some surviving human needs to have access to both. And need to /know/ 
s/he has access (i.e., where to look). And know what to do with the parts.

-kb
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