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See GolemFactory-attestation.txt in this directory for Golem Factory's signed attestation.

Hash of the challenge file for verification:

    f70c2829 5e85dff9 c2109a7e 8f6d3451
    1b2199b6 84670acc a460d26a 3a944b93
    4e65635c 811bd65f bd833147 d27bcfad
    a8b0548e a5bef208 1c684910 a8f6fe95

response was based on the hash:

    f70c2829 5e85dff9 c2109a7e 8f6d3451
    1b2199b6 84670acc a460d26a 3a944b93
    4e65635c 811bd65f bd833147 d27bcfad
    a8b0548e a5bef208 1c684910 a8f6fe95

Hash of the response file for verification:

    241902b0 c9386b3e bb03a786 a4db8b47
    7727b8cd 97e4547b 45cd5205 3ce0c4e7
    cf3d7e36 933f38fb a9283593 2f15b8dc
    950d111b 7b0b4f4a efdb16df 5f6a799a

Blake2b hash of the new_challenge file for participant #32:

    7695680f c6eb5d11 e31b48be a122428a
    11cf5429 d54b7d9d cd24c879 9876ae61
    6850f232 0f68964d b26e04dd 06ce5747
    965e7f41 aefa1eec 790e9566 5c0e6342

The above new_challenge file: https://ppot.blob.core.windows.net/public/challenge_0032

The attestation was signed using the Notary contract. It was signed by Golem Factory's Ethereum address:

0x7da82C7AB4771ff031b66538D2fB9b0B047f6CF9

The attestation was signed in this transaction:

0xaeca872f4d925229e5ee6bc40193a147195e9fb199845f04ef11dc86d6c45362

The data in this transaction contains the SHA-256 hash of GolemFactory-attestation.txt and it is:

777253ea37089fdac284b2ebeb57516e62f758ec274ebfdff01cdfbd81ecb2ea

Golem Factory's attestation:

Date: 16-17 April 2020

Name: Golem Factory

Location: Warsaw, Poland

Device(s): Intel(R) Core(TM) i7-8700K CPU @ 3.70GHz 32873MB RAM

Challenge:

Software used: https://github.com/kobigurk/phase2-bn254/commit/bf852c168676a7afc5dd17b47ff9b8f394aeab8a

Response:

  • Blake2b: 241902b0c9386b3ebb03a786a4db8b477727b8cd97e4547b45cd52053ce0c4e7cf3d7e36933f38fba92835932f15b8dc950d111b7b0b4f4aefdb16df5f6a799a

Entropy sources:

  • random keyboard mashing
  • random words from random books
  • I asked a few people to give me random numbers
  • random value generated based on /dev/urandom
  • random strings collected from online generators
  • coin tossing

Time taken: 29 hours

Side channel defenses: the computer was locked in a separate server room, it's epidemy time - everyone works remotely