Curious if you saved your compute binary?
On Mon, Nov 27, 2017 at 9:32 PM Neal Conner via zapps-wg
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA256
> Powers of Tau Operational Write-up
> Round: 18
> Date: 2017-11-25
> Name: Neal Jayu
> Location: Boston, Massachusetts, New England
> response (blake2b & sha256):
> ef15cb99 7c331928 855dd7ce 42ade214
> 3033be18 5be45f3e eac5b95b b12777db
> 582992b0 a862c92a 1cba4e95 044c52f5
> de857776 31462a0d c51d7a4f 846b9d7e
> After downloading the aforementioned files to my daily Linux machine, I
> checked each's sha256/512 sum against published values, or in the case
> of the Rust standalone, recorded its sha512 sum and verified its
> signature file against the project's PGP key from Keybase.
> I burnt the Powers of Tau zip, Rust standalone installer, Debian ISO,
> and Memtest86+ to DVD/CDs; and copied the challenge file to a SanDisk
> USB drive.
> On the compute node (see Side Channel Defences below), I booted from the
> Debian DVD, installed it to a Samsung USB drive, then booted the machine
> from the USB drive.
> Rust and Powers of Tau were copied from CD. Both sums were re-checked on
> the compute node. build-essential was installed from the Debian DVD.
> I connected Ethernet to run `cargo run --release --bin new` in order to
> download and configure dependencies. Ethernet was removed once complete,
> and the resulting challenge file deleted.
> The provided challenge file was copied over and computation began. As
> input, I used the results of two minutes of 20-sided dice rolls,
> followed by arbitrarily selected words from a book extolling the virtues
> of laissez-faire capitalism.
> One complete, a hash of the response file was taken, copied to the
> SanDisk USB drive, then uploaded to the AWS bucket via my daily machine.
> Side Channel Defences & Postprocessing
> The compute node was a disused 7-year-old Lenovo Thinkpad T420 borrowed
> from a friend without foreknowledge of my intentions for it.
> I removed the hard drive prior to booting the laptop. Although I did not
> have permission to remove its radio devices, I activated its hardware
> switch which purportedly disabled them.
> Further, during the installation of the Debian instance onto the Samsung
> USB drive, I declined to install drivers for the machine's wireless
> The computation was performed within living quarters with no particular
> precautions taken save for watching Voyager at formidable volume and
> inaudibly typing the entropy sources.
> After copying the response file and Blake hash to the SanDisk USB drive,
> I powered off the laptop and booted into the Memtest86+ CD. I allowed
> Memtest to run for two full cycles (about 1.5 hours) then powered off.
> I removed power and battery from the machine and intend to leave it
> powered off for the foreseable future.
> The Debian installation media, Powers of Tau repo, Rust toolchain, and
> Memtest are on DVD/CDs which I've autographed.
> The Samsung USB drive containing the Debian instance, and SanDisk USB
> drive with challenge and response files (and their hashes), are both
> LUKS-encrypted. As such, I don't expect these to be tampered with
> following the operation.
> I've sealed all five of the above media in a signed and sealed envelope,
> which I've locked in a safe to which I alone posses the keys. They are
> available to audit upon request.
> -----BEGIN PGP SIGNATURE-----
> -----END PGP SIGNATURE-----
> El 25/11/17 a las 15:54, Sean Bowe escribió:
> > You're next! :)
> > Sean
> > On Sat, Nov 25, 2017 at 1:50 PM, Neal Conner via zapps-wg
> > <zapps...@lists.z.cash.foundation> wrote:
> >> Hello,
> >> Please consider this my request to join the MPC ceremony.
> >> I've made the necessary preparations and can compute within 24 hours of
> >> receiving the challenge file, including today if a slot is available.
> >> Thanks,
> >> Neal Conner
> >> https://keybase.io/nealjayu