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Sean

On Fri, Dec 15, 2017 at 10:11 AM, Fabrice MARCHAL <fabr...@fmarchal.fr> wrote:
>
> 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 <s...@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...@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

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