Add Wob Bzz's contribution.
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Sean Bowe
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# Wob Bzz
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* https://twitter.com/btcwobbzz
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* See `./report.asc` for a signed attestation.
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Response file:
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* https://powersoftau-transcript.s3-us-west-2.amazonaws.com/e08045d5233a623c658b3db18ec21f407077e856cfc99239aefd72d32638df49c83d78f9bbf70ae4c8ed9bd1bd0206fd89d783bf8f03843e51cd751491502471
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-----BEGIN PGP SIGNED MESSAGE-----
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Hash: SHA512
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Powers of Tau Attestation by Wobbzz aka @btcwobbzz (Twitter)
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Location: Colorado, USA
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Datetime: 29 Jan 2018, approx 1100 MST
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I approached Sean via email to participate in this ceremony without announcing my intent over the mailing list.
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I used an ASRock 990FX motherboard with a FX-8350 CPU. This machine is normally a gaming rig, but has been mining zcash with 2x 1070ti's lately. It is normally configured with 32GB DDR3 for gaming purpo
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ses and I've been too lazy to remove any of that for mining. However, for the purposes of this ceremony, I dug out 2 old spare sticks of DDR3 memory from a box of old components. These 2x2GB sticks were
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put in place of the 32GB bundle specifically for the ceremony.
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I loaded a previously downloaded Gentoo live iso onto a virtual drive emulator, booted into this live OS, and used this temporary environment for the whole ceremony. I ran the following commands to set up my environment using the command line:
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# Setup Rust compiler
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curl https://sh.rustup.rs -sSf | sh # Setup Rust compiler
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source $HOME/.cargo/env # Source the new Rust binaries
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cargo -V # Obtained the version of cargo being used: cargo 0.24.0 (45043115c 2017-12-05)
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# Setup permanent file storage
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I recently bought a brand new 32GB flash drive from a local retailer for temporary storage for this competition. I opened the packaging today during this process.
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I deleted the existing FAT partition on the drive using fdisk, created a new Linux partition, then formatted it with mkfs.ext3.
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This partiion was mounted to a newly created /mnt/tau directory.
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# Setup Powers of Tau ceremony files
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cd /mnt/tau && git clone https://github.com/ebfull/powersoftau.git && cd powersoftau
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git show:
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commit d47a1d3d1f007063cbcc35f1ab902601a8b3bd91
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Merge: 9e1553c 22846cd
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Author: ebfull <ewillbefull@gmail.com>
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Date: Thu Nov 16 06:13:08 2017 -0700
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curl https://s3-us-west-2.amazonaws.com/powersoftau/pwQRzsZ9uDzR8rzOxXkiHCB2vVIVegL3/index.html # to find the download link for the challenge file.
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wget https://s3-us-west-2.amazonaws.com/powersoftau/pwQRzsZ9uDzR8rzOxXkiHCB2vVIVegL3/challenge
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sha256sum challenge # 10799da998e46c2fc276599e62160103210bf79fa9e93061c05d9c3f8d3588ab challenge
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# Run the computation
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cargo run --release --bin compute
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I provided a few fistfulls of entropy (literally) by running my fist over the keyboard for a few lines, occasionally holding the shift key. 493 characters of entropy were provided (yes I counted).
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The computation ran for about 45 minutes. I ate my lunch while watching the bits do their thing. I never left the machine unattended. My cat also assisted in guarding the machine.
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https://imgur.com/a/04ZRs
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The computation spit out the following hash:
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The BLAKE2b hash of `./response` is:
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e08045d5 233a623c 658b3db1 8ec21f40
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7077e856 cfc99239 aefd72d3 2638df49
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c83d78f9 bbf70ae4 c8ed9bd1 bd0206fd
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89d783bf 8f03843e 51cd7514 91502471
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sha256sum response # 0a3e32b1fbfd0c568c4a9400c74a4fd9c451bcba4b2ca8c049c579f2e5e66496 response
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I then shut the system down and removed the ceremony specific sticks of DDR3 memory. They'll go back in the random box of stuff until needed for a future project.
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Overall the process was quick and easy. I didn't do anything fancy or have any witnesses present. I'm happy that I was able to contribute my part in securing the project.
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-----BEGIN PGP SIGNATURE-----
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Version: Keybase OpenPGP v2.0.76
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Comment: https://keybase.io/crypto
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wsFcBAABCgAGBQJab4SeAAoJEDUt8XcRdgNOO7UP/A72gIiM/20iGuHO5eugpT9p
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mE5N4BCfeTmwg53QO8/0+QlXw6fJwmVE8kIUCS9RWdvMhdYKv6AZSgeNv9qgSKe+
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xL9I6K9gFluqsLQdPzFZmuojTu869ipDcQgQvA/jFLW8h6eJfioUhVdh09j3JAQ6
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gPmL7kgWbY8/ERu9dtPigxI1hi+S5i9ZnETkOOGKukeaO0EBBqZPUyaHCfXCWQIC
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V75rcxS1SdGuv1KN7Cjq1Kgm3KqHJl69dAK7Xa15DZSVF2idcHVW+jT6IhiXSOPY
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o13l4Py23v/pIyl0us0u2v3Llpq/w1VEx/h42U3DOU8q9Fy5hqR4Ds2PSJ8pxVSx
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iynKmQBnpahvucx7FJ0z4FpT0I3oD1EqwTdXl/Gu+Upst2iFa486CQZH98HnEekh
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Pj3ZpGqNLUCfA/X9TkjnBsFms0SewfoDVb1DYiXd+w5kPGNEcG4puG6snXkD72VX
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+wQ1WdSuoNmzVFaaoBnae1jXHmjcvayzyI+0XRXDE4+XOH74l0sETniAFAcS8A1A
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TO3PGLJYvMANKjgvHnIIq7IPiQPhyQexd9l5NftrC7PSCn1eiWUuMgxE8ZIiJvMF
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bOZ+AEVa89f/868Pmp9/G4RLE4aVhETptK7AGvXQPcKyap/benx/uAFzJlEa+0tK
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vKih/4ENZPiyyej/i1Y0
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=KPPB
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-----END PGP SIGNATURE-----
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@ -45,6 +45,7 @@
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43. [Ivan Acosta-Rubio](./0043/) 73c1faf7b609b4392bf217fee2c5c59afb35f20b2016dacd627366bc7f4adfbea083e212cef7c70d03182932ea67676a5265575d9d0c24eac0f7abab843dd62a
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44. [Orfeas Stefanos Thyfronitis Litos](./0044/) 9fa3bd80a4039804c080064afcc8fd77defb9a3aa09b6bb7dbec189acc4f178d5d7a8a2ffe528cb441365917362b89a544c051a22e56249de5ce43ecefc16669
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45. [Filippo Valsorda](./0045/) 7b55c0f568a8b4df2ca140852e816df2b9a2dafe50b2c5e25e6c9b6adf239de0223a9866aba481a8436fbd4204a2c48a43725d942de47b23c10c5e8738fd6467
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46. [Wob Bzz](./0046/) e08045d5233a623c658b3db18ec21f407077e856cfc99239aefd72d32638df49c83d78f9bbf70ae4c8ed9bd1bd0206fd89d783bf8f03843e51cd751491502471
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## License
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