Thank you! Another fun attestation. :) Sean
On Wed, Jan 17, 2018 at 7:47 PM, Ryan Close via zapps-wg <[email protected]> wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA512 > > Powers of Tau Attestation > ========================= > > Round: 38 > Date: 2018-1-17 > Name: Ryan Close > Location: Florida, US > > Challenge: > a58bcc60b15a6cd3d69fa7ef87b4f9d2f9be6eb2d470f66e0dadc8058a14c8ca18efaa1ca69346865d3f83bbc9fe1320e5c16f3580567963a206d337377a82ea > Response: > c63d895327712427bb14295d7935af4cb79bbdf9b84411684b9cd3292750f63261f3a874ec160e070cdd98bcdd2b1dd21cf20f937fb486c0ac1cab12bb3a0046 > (tweeted: https://twitter.com/closerm/status/953816452997500929 ) > > Process > ======= > > UBUNTU 16.04.3 Desktop (x2) > Rust v1.23.0 (766bd11c8 2018-01-01) > powersoftau (github.com/ebfull/powersoftau commit > d47a1d3d1f007063cbcc35f1ab902601a8b3bd91) > > I began by installing ubuntu-16.04.3-desktop-amd64.iso to a brand new > formatted USB thumbdrive. The drive was encrypted (cryptsetup). > I booted from this drive in VirtualBox, allowing me to update the OS, > install the rust toolchain, and clone the needed git repository. > The VM was shutdown, and the thumbdrive was removed to be used with an > offline machine (no wifi, disconnected ethernet) that has no other physical > drives. > > The above was performed twice, and moved to two seperate offline machines. > > Prior to attaching the Ubuntu OS thumbdrives to either stand-alone machine, > each machines was booted with a live image and memtest was run. > > The provided challenge file was downloaded and placed on a second new and > newly formatted thumbdrive and moved to the disconnected computer(s). > > For each compute node, extra entropy was introduced by letting my kids type > at the keyboard until they felt good and satisfied, or until one of them > accidently hit [enter]. > > When complete, each node was verified (via verify_transform), results copied > to the thumbdrive. Dice (and kids) were then used to choose which payload to > report, and the result was uploaded. > > All 3 thumbdrives have since been securely erased, reformatted, and > intermixed with a stash of several other similar and empty drives. > > Driveless stand-alone machines have since been booted and memtest run, and > will eventually be brought back onto the network. > > > > Side Note > ======== > > Attempts were made to use additional hardware, OS, and software > configurations. > > Raspberry Pi3 nodes were tested to see if they could be used, but do not > have enough RAM to complete the compute job. > PINE64 nodes were tested to see if they could be used, and while they faired > much better than the Raspberry Pi's, they ultimately failed to complete the > compute job aswell. > > > -----BEGIN PGP SIGNATURE----- > Version: Keybase OpenPGP v2.0.76 > Comment: https://keybase.io/crypto > > wsFcBAABCgAGBQJaYAmKAAoJEIKOoktVTw1jxVkP/iKfNVYlHGzZLVzjzlRqwi+U > pedJjROB5LhWRXq4cPB1CfWOkVyzvljOEdgDuzzwN8Ar+QFoQnd8YpanGx8ysWVR > UHZrMMlfQq/V/pI76DEsxXYNhuh/hs95TSnf7DaZtGPizYXE2nJrWQBl7tiZ8FyQ > RYcIiK4sPaHnFwKTpFqy9fzetPG5hdvNb/cTYpucyHyflZbiqchOW7o8WFGK7jr/ > 3tTnPDL6L5ywknre4CJ8iWDL+nOYTfhSSjNTjWVvGE0VeM/RfxtBcBDbt9YpNLRj > IZ9o0JJDEV/wDVI/BDCg3IMKzMrGTirN9edCv1Iyem6cj5lOlFZHqHby/kLTXqWH > sdk6aowVxR2AyVJY85vWfD0bcAexb2hEWxXLrzxUGX7bSDzE4g6lLT3KtvIlRRIY > gaSqVPwZ2puKZVXEz2op8573lhZ1LSBHw9UFWgXvZAE+3ob3+/vFXp425h4/Zvd2 > 8cTkVWpKUo1GijIoJWysuOc4gouO6oav055ix7GfXCLQ6kYeKwLmS7iDvUK7yIm1 > kBnCiVvY8kGdfm1TQAYucH/HVmfVmuoMmI37G7yEKFFEB/XDwdK2ynoo+sbr+ZZL > 7Qd1FpAbBpl+YXFnOYXP3TDrXQ8X1kk5YoCQwzAsPS5a/TTaVJyk7e2nPDZverP2 > hDYsjfVq5oaE+tYLCeiR > =2Par > -----END PGP SIGNATURE----- >
