phc-discussions - Re: [PHC] on timing attacks

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Date: Thu, 1 May 2014 11:15:45 +0200
From: Krisztián Pintér <pinterkr@...il.com>
To: discussions@...sword-hashing.net
Subject: Re: [PHC] on timing attacks


Solar Designer (at Thursday, May 1, 2014, 6:45:07 AM):
>> granted, this attack is largely thwarted by secret salt. however, in
>> some situations, for example in case of server relief, the salt might
>> be available to the attacker, while the password hash is not.

> However, note that in case of "full" server relief there would be no
> secret-dependent memory lookups on the server (there would be only a
> quick last step, like HMAC), so that case doesn't fit your scenario.

however, the attack becomes possible on the client.