[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20140720024857.GA26724@openwall.com>
Date: Sun, 20 Jul 2014 06:48:57 +0400
From: Solar Designer <solar@...nwall.com>
To: john-dev@...ts.openwall.com
Subject: Re: ZedBoard: bcrypt
Katja,
On Sun, Jul 20, 2014 at 05:12:10AM +0400, Solar Designer wrote:
> On Sat, Jul 19, 2014 at 07:10:09PM +0200, Katja Malvoni wrote:
> > While testing with
> > cost 12, the zed system rebooted. I guess it's overheating since you modded
> > the board so it shouldn't be voltage drop problem.
>
> Yes, as I mentioned to you via private e-mail, in the current plastic
> box the board overheats when Zynq PL is in full use for more than a
> couple of minutes. I'll look into adding a fan (perhaps 40mm, like old
> graphics cards had).
I've just added a 40mm 12V 0.08A fan connected at 5V. I tried several
of these 40mm 12V fans, and chose one that most reliably spins up at 5V.
I think when connected like this it consumes under 0.5W (maybe 0.3W).
Compared to Zynq's heatsink, this fan looks huge. ;-) It covers an area
about 3x bigger than the heatsink.
I don't know where your latest code is, so I've used the older 112
instances code with 64 same-salt cost 12 bcrypt hashes. This test
passed with the board already in the plastic box:
root@...aro-ubuntu-desktop:~/k3/JtR_112# cat bcrypt_112cores_5brams.bit.bin > /dev/xdevcfg
root@...aro-ubuntu-desktop:~/k3/JtR_112/JohnTheRipper/run# ./john -i=digits4 ~solar/pw-bcrypt-12-64
Loaded 64 password hashes with no different salts (bcrypt [Blowfish 32/32])
Press 'q' or Ctrl-C to abort, almost any other key for status
1 (?)
12 (?)
[...]
46 (?)
47 (?)
64g 0:00:02:46 0.3848g/s 64.65p/s 64.65c/s 2477C/s 282..275
Use the "--show" option to display all of the cracked passwords reliably
Session completed
Alexander
Powered by blists - more mailing lists
Confused about mailing lists and their use?
Read about mailing lists on Wikipedia
and check out these
guidelines on proper formatting of your messages.
