phc-discussions - Re: [PHC] more woes, last woes

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Message-ID: <CALW8-7+LJEJZ0izK0c5Ahc6p-Q_Ef0yHWT9RV8w2fyZwLzhCYg@mail.gmail.com>
Date: Tue, 15 Apr 2014 20:29:02 +0200
From: Dmitry Khovratovich <khovratovich@...il.com>
To: "discussions@...sword-hashing.net" <discussions@...sword-hashing.net>
Subject: Re: [PHC] more woes, last woes

Hi Krisztian,

The main strength of Argon is the penalty it imposes on any memory-saving
attacker. If you afford only half of memory, the time complexity grows at
least 90-fold.  We hope that the new text on wiki clarifies that.

We removed all vague statements, as 'simple' is indeed to subjective.

Best regards,
Dmitry



On Tue, Apr 15, 2014 at 6:28 PM, Krisztián Pintér <pinterkr@...il.com>wrote:

>
> okay, maybe i'm too bitchy, so this is the last time i'm not going to
> complain about this, and then i let people in charge to deal with such
> things.
>
> here are argon strengths as of now:
>
> > Tradeoff-resilient (50-70 computational penalty for using 1/2 of
> > memory)
>
> what does that mean? 50-70 what?
>
> > Simple architecture
>
> simple compared to what? certainly not simple compared to pbkdf2, or
> compared to catena.
>
> > Fast with AES-NI (five-round AES)
>
> what does that mean? why do we care how fast it is if we plan to run
> it for 100ms anyway? what is "with" here? aes-ni is a prerequisite of
> fastness? or cause? what is the point?
>
> if the strengths section will continue to contain such vague and adhoc
> claims, its usability will not be very high.
>
>


-- 
Best regards,
Dmitry Khovratovich

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