See mike_attestation.txt in this directory for Mike Lapinski's signed attestation.
Hash of the challenge file for verification:
10e6b25c 4b066b59 a5b837d2 460a78b1
59edb6cb 2018ae0a a74b7555 499c9690
b16b4f38 99fa8147 b9bc4602 5b634eef
8e998fa2 44f9fe64 4df29ee9 a0944e7a
response was based on the hash:
10e6b25c 4b066b59 a5b837d2 460a78b1
59edb6cb 2018ae0a a74b7555 499c9690
b16b4f38 99fa8147 b9bc4602 5b634eef
8e998fa2 44f9fe64 4df29ee9 a0944e7a
Hash of the response file for verification:
cf0abf2f 06b4f5d1 3ab6ff1b 59e1ff40
a9a2e9b4 fdf27eac 0b1345e8 c89cbc3f
142d00d9 742d8e1a cc996425 cc626531
fb1be7b2 86640d09 c2909072 f26b9a3e
Blake2b hash of the new_challenge file for participant #9:
af1d28b6 e1c2e68f 5c871f3e 01856f25
2ef4f745 a3e39e3d 2aa3bc40 7f82b4a5
feb2ba4c 303f90fb 15c86929 0611b732
be31f29a 15e5d609 6f555cd0 683e5421
The above new_challenge file: https://ppot.blob.core.windows.net/public/challenge_0009
Mike's attestation (from mtl-tau-attestation.txt):
Here is my attestation for round #8:
Date: 10-11 October 2019
Name: Micheal Lapinski PhD ([email protected] | [email protected])
Location: Mammoth Lakes, California, USA and Jackson Hole, Wyoming, USA
Device(s): Thinkpad P52s - 8 core i7 1.9GHz - 32gb RAM - Ubuntu 18.04.3 LTS
Challenge hash:
10e6b25c 4b066b59 a5b837d2 460a78b1
59edb6cb 2018ae0a a74b7555 499c9690
b16b4f38 99fa8147 b9bc4602 5b634eef
8e998fa2 44f9fe64 4df29ee9 a0944e7a
Response BLAKE2b hash:
cf0abf2f 06b4f5d1 3ab6ff1b 59e1ff40
a9a2e9b4 fdf27eac 0b1345e8 c89cbc3f
142d00d9 742d8e1a cc996425 cc626531
fb1be7b2 86640d09 c2909072 f26b9a3e
URL: https://ppot.blob.core.windows.net/public/challenge_0008
Software used to generate the response: https://github.com/kobigurk/phase2-bn254/commit/bf852c168676a7afc5dd17b47ff9b8f394aeab8a
Entropy source: My 8 month old daughter, Hanna Lapinski, went to town banging on the ole qwerty.
Time taken: ~10-15 hours
Side channel defenses: Security by obscurity - performed one part of ceremony in the mountains with no neighbors.
Postprocessing:
- I copied the Blake2b hash from the CLI output of compute_constrained
- I traveled to Jackson Hole, WY and uploaded the response via massive.io
- I signed the
- I zeroed the disk of the laptop