phc-discussions - Re: [PHC] (not) protecting password length from side-channels (Re: [PHC] Argon2 modulo division)

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Message-ID: <CA+hr98GFGoXg8uF5c33EzGboeqvww-4+Z3ozV9jgY-UV4_7G+w@mail.gmail.com>
Date: Fri, 24 Apr 2015 10:25:45 +0200
From: Krisztián Pintér <pinterkr@...il.com>
To: "discussions@...sword-hashing.net" <discussions@...sword-hashing.net>
Subject: Re: [PHC] (not) protecting password length from side-channels (Re:
 [PHC] Argon2 modulo division)

On Fri, Apr 24, 2015 at 1:38 AM, Bill Cox <waywardgeek@...il.com> wrote:
> If you compute H(salt || domain || password) when
> talking to a remote URL, and send an ASCII hash digest instead of a
> password, you gain a lot of protection, regardless of what hashing algorithm
> the remote server uses.

it is a very good client side password management option, but you need
a costly H to be secure. developing such a H is our task here :)