phc-discussions - Re: [PHC] Transforming hash to different cost setting

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Date: Sat, 22 Mar 2014 10:32:45 +0100
From: Christian Forler <christian.forler@...-weimar.de>
To: discussions@...sword-hashing.net
Subject: Re: [PHC] Transforming hash to different cost setting

On 22.03.2014 10:23, Krisztián Pintér wrote:

> Christian Forler (at Saturday, March 22, 2014, 10:15:33 AM):
>>> so far, i have heard only one reason for offline cost upgrade, and it
>>> is the problem of abandoned passwords. however, for that problem, we
>>> have the obvious solution of simply deleting old passwords.
> 
>> For the weak password problem, we have the obvious solution of
>> simply using strong password. SCNR! :-)
> 
> nice observation, but i was not talking about weak passwords.

>> Companies usually do not delete user/costumer accounts/records/files
>> since they rate those data as mission critical.
> 
> nice observation, but i was not talking about accounts/record/files.


Lets just assume that password hash are part of an user/costumer record.
This reasonable assumption implies that profit oriented companies will
not delete old password hashes.

Best regards,
Christian









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