phc-discussions - Re: [PHC] A must read...

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CA+aY-u47oGNhxR3C8o9V6f5rMyTcF0Mymnu0gsWVSqgKyf7dVw@mail.gmail.com>
Date: Tue, 14 Jan 2014 21:39:43 +0000
From: Peter Maxwell <peter@...icient.co.uk>
To: discussions@...sword-hashing.net
Subject: Re: [PHC] A must read...

On 14 January 2014 21:10, Krisztián Pintér <pinterkr@...il.com> wrote:

>
> Marsh Ray (at Tuesday, January 14, 2014, 9:27:40 PM):
>
> > Looks like 500 MiB DDR3 is currently $4.22 retail. This doesn't
> > sound cost-prohibitive
>
> please note that the proposed hypothetical machine consists of 2^32
> units. if you want to add $4 memory to all of them, we are talking
> about 16bn dollars + a new power plant. granted, you work for MS, so
> you can imagine that :) but not many others can.
>
>
The paper says it needs ~2^42 bytes of memory (page 3).  Assuming we use
500MiB units, it means you'd need around 8,400 of them, give or take.  For
$4.22 a piece, that's less than $36,000.

Unless my arithmetic is off (in fairness, my handling of basic arithmetic
is surprisingly poor so definitely worth double-checking).

Content of type "text/html" skipped