phc-discussions - Re: [PHC] Memory-hard proof of work with fast verification (CPU Hash)

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Message-ID: <20150705150356.GA29366@openwall.com>
Date: Sun, 5 Jul 2015 18:03:56 +0300
From: Solar Designer <solar@...nwall.com>
To: discussions@...sword-hashing.net
Subject: Re: [PHC] Memory-hard proof of work with fast verification (CPU Hash)

On Sun, Jul 05, 2015 at 03:54:51PM +0100, denis bider wrote:
> Solar Designer (Alexander):
> 
> > Sure, but this makes your 512 MB ROM sort of irrelevant for
> > GPU attacks. They can have that 512 MB in their GPU card's
> > RAM, and will run almost as fast (for a trivial enhancement
> > of scrypt) or just as slow (for yescrypt with pwxform).
> 
> You guys are making it sound like all GPU RAM has same performance characteristics.

Wrong impression.  You might want to read the 2 years of archives of
this list. ;-)

Alexander