-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Powers of Tau Operational Writeup =================================
Date: 2017-11-17 Name: Cody Burns Location: MTR train >> Hong Kong China Challenge: 4f86db7dd1edf502d28d3febe59018e865c9227e2ab33eeee0fb33c91d761c11891bc076bbf80b7fbea911f354eec509b5dadd8ba678c6b53dbc6e5479d3117a Response: 3002034f75e83f530d9a949071e6fb28a9f1e39c563bced27d91bf5cc45f0c16e866ffb30c912cf7648bde08f0709f1846d758ecfcec62dcdc2eb16c685e60d1 Preparation Steps ================= Git repository: https://github.com/ebfull/powersoftau Commit hash: 9e1553c437183540392a7231d0788318a19b18a3 Compiler: rustc 1.21.0 (3b72af97e 2017-11-09) cargo 0.22.0 (3423351a5 2017-10-06) Build: cargo build --release --features=u128-support vm: VirtualBox-5.1.28-117968-Win; b2sum: f59139212d894bee17ecce234ad57bae188348856b5d85ca4cea46247d9b87e453c807e002b3277cf348df61502a6caaf549a154af0a8b8648b87ddf2d627326 Level 1: ubuntu-16.04.3-desktop-amd64.iso; b2sum: fa6650810ad70a6a13b5baf33180499f115c2fd160e655b329fa1f708e1f0803432b5a70446e64522107eff67097222e77bd592420c536ed634b2677c5b9befc sha256sum: b2sum-amd64-windows.exe:914abb5152d7f179ca377c843494fe718a87023320edcbbfe8dba6010f57e94a b2sum-amd64-linux: 529c90f8cd003b3485defef239a5ae7f62470342c3a65493abfba9e190413451 - - From random street market vendors in Hong Kong 4x4 puzzle cube -- unhashable 2 usb drives (so much virus scanning and formating) Spongebob usb formatted and installed Ubuntu I reformatted a pikichu USB stick to ext4, then copied the `challenge` file and the `target/release/compute` binary. Side channel Defenses ==================== Entropy source: using "4x4 cube" toy, - key/value wordlist created on flight Houston >> San Francisco. Hand written on "air sick" bag - eBook reader last updated: 7/7/2017 - 1 book from 168 chosen based on first 2 numbers of b2sum sha256, "Nueromancer" (fitting) - Key: 6 page numbers chosen at random - Value: 6 unique words chosen per page - Mapping: Center color square == key; reading left to right, top to bottom, color == value for word - Process: - on "compute trip" - random turns to scramble set - solve 6 center squares - "roll cube like dice" - enter word set - repeat 3 times: 36 total words (key square omitted from set) Physical/electronic monitoring: All steps preformed on an airgapped laptop in "blackout bag" on a moving train under the city of Hong Kong so no casual monitoring could be employed, any physical altercations would be highly unlikely, and I would be traveling hundreds of km per hour in a faraday cage over under rock and chaos Procedure ========= Prep: on the first leg of multi-leg flight created wordlist Dwell time: Stay in coffin hotel in questionable part of town with only paper checkin and no english, purchase supplie;received new Challenge from Sean Compute: Level 0 - Computer in airplane mode wifi chip disabled I started windows and the vm with ubuntu 16 desktop(level 1) with no network bridging. Level 1: I compiled the compute binary, and transfered to spongebob Level 2: loaded linux Pikichu usb -"Try Ubuntu" (Live CD mode). I imported the previous challenge/response codes and verified them. Enter the train. I then began the entropy creation "ceremony" and entered the values. Wrote down BLAKE2b hash, unmounted drives Postprocessing ============== Destroyed level 2 and level 1 vm image I took the USB stick and transferred the response file to level zero, and then uploaded it using the laptop to the aws s3 site from my phone using tor over airport wifi and posted the image hash on twitter as well as the mailing list image: ipfs/QmZkVPctuTTDbNfT5fM3aYbDPwBB9hMFjBDSRhNswNx9j3 - - -- Cody Burns, CodyWBurns.com … Ethereum Classic Development community Blockchain Architect codywburns.com -----BEGIN PGP SIGNATURE----- iJwEAQECAAYFAloO12oACgkQEfOYz7+6WMLjmAP/VpszJATk2ezn++KsBwR9+Xt4 TEEW9xAtx4mtqrvQ/LtW3tPaGPYN5nXHHqvbqw9tYJgL/fN/IZte6W+fP/sI00Tr 9Xr7bM/p+8yfohbLahXlozowNvSrLkRZeOUhkUmxxa345UCkfkCQhGGnhsN5SaDc Ljnx7uU6/s0LiQck+KU= =/z6t -----END PGP SIGNATURE----- On Thu, Nov 16, 2017 at 9:55 PM Sean Bowe via zapps-wg <zapps...@lists.z.cash.foundation> wrote: > Thanks Hudson! :) > > Eric finished but hasn't posted their attestation yet. Now it's Cody's > turn. > > Sean > > On Thu, Nov 16, 2017 at 8:21 PM, Hudson Jameson via zapps-wg > <zapps...@lists.z.cash.foundation> wrote: > > I have finished the report and made a PR in the attestations repo: > > https://github.com/ZcashFoundation/powersoftau-attestations/pull/5 > > > > I also made a fun Imgur album of the adventure: > https://imgur.com/a/2rUDz > > > > Please note that there are 2 names for round 6, Hudson Jameson and > > Steven Schroeder. > > > > Hudson Jameson > > >
