[zapps-wg] Participate in next MPC round
Fabrice MARCHAL
fabrice at fmarchal.fr
Fri Dec 15 12:11:32 EST 2017
Powers of Tau Operational Writeup
=================================
Round: 25
Date: 2017-12-15
Name: Fabrice Marchal
Location: Paris, FR
BLAKE2b (challenge) =
5e082983f7b07fefeff1303209caeb9eccaa1ccd5ec365d09cdcb413b9f9fecfd85f79c577028e67efd9ff1f062c8b603b65a6e5ed51b98bd477704a1341034d
BLAKE2b (response) =
b39c2f54485df51cd0434b0d3cbfcff7b7cc02c2e941097526cf5e605c9f8aaddd3cf9372d0e567cad8c49d7b507a47dac7510203a7f2f00b7d7810636064f06
https://github.com/LeBleu89/powersoftau-tools/
- Binaries and packages used to create response file
- Some pictures
Preparation steps
=================
Git repository: https://github.com/ebfull/powersoftau
Commit hash: d47a1d3d1f007063cbcc35f1ab902601a8b3bd91
powersoftau-master-d47a1d3.zip : SHA256 =
0902301defc0705d3d824d9ec17382f40785cb9ce84502ee13b774840752def7
rust-1.21.0-1.fc27.x86_64.rpm : SHA256 =
c4abe782505c90232fa65eb6f3de550cf3068cc3f4ba8dfeeb3a4967fc783aea
cargo-0.22.0-1.fc27.x86_64.rpm : SHA256 =
078b1292716488af6b96494a581726565c24e41b913a424b7a2fbfdf73ccb613
Fedora-Workstation-Live-x86_64-27-1.6.iso : SHA256 =
d242345fa6b5f8cc80e2317c46d15bb1fc4ad70b9a3516c9bc2fb6f3599c8117
I burned 3 DVD-R with all needed software :
1) Fedora 27 Live DVD
2) compute binary (build by myself) and brasero software
3) challenge file
Sidechannel Defences
====================
I tried to make a rudimentary faraday cage with aluminum foil all around
the airgap compute node. The compute node was plug only to the screen,
keyboard, mouse and DVD reader.
The compute node is a spare Dell precision T3610 already used before. I
removed hard drive and speaker. There was no wifi or bluetooth chip
inside.
All the computing process was done on RAM and i run 1 pass of Memtest
before and 2 passes after.
I was alone in my flat(except my cat) during the compute process with no
device around the compute node.
Procedure
=========
I downloaded Fedora iso and challenge file on my daily computer and i
burned then into DVD-R media.
I booted the airgap compute node, on Fedora Live DVD and I created a
ramfs partition to store compute binary and challenge file.
I enter some text to provide additional entropy as requested :
- License plate of random cars in the street
- Words taken randomly in one book on my desk
- Random type on keyboard
Computing process took around 1 hour.
I burned a 4th DVD-R with response file and I inserted it inside my
daily computer to upload it.
The BLAKE2b hash of `./response` is:
b39c2f54 485df51c d0434b0d 3cbfcff7
b7cc02c2 e9410975 26cf5e60 5c9f8aad
dd3cf937 2d0e567c ad8c49d7 b507a47d
ac751020 3a7f2f00 b7d78106 36064f06
Postprocessing
==============
I destroyed the 4 DVD and i run a complete Memtest on compute node, 2
passes.
I did not destroy the computer or hardware inside but i won't used it
until 1 month and it will be unplugged from power source.
---
Fabrice MARCHAL
Le 14-12-2017 08:34, Fabrice MARCHAL via zapps-wg a écrit :
> Hi Sean,
> I mean this week (15/12, 16/12, 17/12) and next week (22/12, 23/12,
> 24/12).
>
> --
> Fabrice MARCHAL
>
> Le 14 décembre 2017 05:51:35 GMT+01:00, Sean Bowe <sean at z.cash> a écrit
> :
>
> Absolutely! By "next Friday, Saturday or Sunday" do you mean over the
> next 3 or 4 days or next week?
>
> Sean
>
> On Wed, Dec 13, 2017 at 12:15 PM, Fabrice MARCHAL via zapps-wg
> <zapps-wg at lists.z.cash.foundation> wrote:
> Hello,
>
> I would like to participate in MPC.
>
> My compute node is ready and i fully tested the computing process.
>
> Let me know if you need more information about my process or about me
> before
> to participate in MPC.
>
> If nobody is in line i can be the next, i'm able to do this on next
> Friday,
> Saturday or Sunday.
>
> Thank you
>
> --
> Fabrice MARCHAL
Type: application/pgp-signature
Size: 836 bytes
Desc: OpenPGP digital signature
URL: </pipermail/zapps-wg/attachments/20171215/a8315bba/attachment.sig>
More information about the zapps-wg
mailing list