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Date: Thu, 25 Jun 2015 15:06:08 +0800
From: Ben Harris <>
Subject: Re: [PHC] Why protect against side channel attacks

On 25 June 2015 at 14:25, Solar Designer <> wrote:

> In fact, to fully defeat the attack, it is sufficient to have s or h;
> it is not necessary to have both.  (In practice, it may be helpful to
> have both for other reasons.)

'h' being preferred over 's', as a system without 'h' would still leak
password information as identical passwords would have the same
side-channel data.

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