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See iw__attestation.txt in this directory for Ian Worrall's signed attestation.

Hash of the challenge file for verification:

    77b44d1b 8de961bd de398de3 01f9dd85
    40d9cf7f 254521f6 c4abb6b6 33bc0bf0
    ef37df69 4e2ee9da ac383ac4 0593ec05
    334613d6 26a69aaf c053adfb 1bfe4ec6

response was based on the hash:

    77b44d1b 8de961bd de398de3 01f9dd85
    40d9cf7f 254521f6 c4abb6b6 33bc0bf0
    ef37df69 4e2ee9da ac383ac4 0593ec05
    334613d6 26a69aaf c053adfb 1bfe4ec6

Hash of the response file for verification:

    280c0550 220aa62b 60c03b37 619b9bd2
    a03b5754 7e34be46 e9017217 5ba020ed
    f4ab2c8b 5b01074b 4b87e517 eb25c42a
    cf273c79 ee4f7e80 c4a19a10 8a74b2b3

Blake2b hash of the new_challenge file for participant #65:

    b8fa9e69 94d17c29 1dbb1dd6 2083091a
    bd3576fa 766f7d55 b1877552 d90fcdd2
    2b0414c8 bd8c6753 bd69a851 2fdc7747
    a8cc5d8d eb9e0ca9 c56d6858 b7ce9f97

The above new_challenge file: https://ppot.blob.core.windows.net/public/challenge_0065

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

0x2B50d53c2d10954aEA741ae61001c3fb77717e5e

The attestation was signed in this transaction:

0x1f5d6baea20ce329a68ecb8b8e4aae0db749ff651938d8f626dfd7ed3aa94e07

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

ed7f8f41a75d253c8f6528452d17a6dad5d4b65919e6a912187a07b9ad50f0fb

Ian Worrall's attestation:

Attestation to response 0064

Date: 2020 Nov 25

Name: Ian Worrall

Location: Central Europe

Device(s): Ubuntu20.04 VM running on personal server

Challenge:

Blake2b:   77b44d1b 8de961bd de398de3 01f9dd85
    40d9cf7f 254521f6 c4abb6b6 33bc0bf0
    ef37df69 4e2ee9da ac383ac4 0593ec05
    334613d6 26a69aaf c053adfb 1bfe4ec6

URL: https://ppotde.blob.core.windows.net/public/challenge_0064

Software used: https://github.com/iden3/snarkjs

Response:

Blake2b:   280c0550 220aa62b 60c03b37 619b9bd2
            a03b5754 7e34be46 e9017217 5ba020ed
            f4ab2c8b 5b01074b 4b87e517 eb25c42a
            cf273c79 ee4f7e80 c4a19a10 8a74b2b3

Entropy sources: Bitcoin Block Hash, Keyboard Mashing

Total Time taken:~24 hours File Download: ~38min Challenge: ~24 hours

Side channel defenses: None.

Postprocessing:

I uploaded the response to an SFTP server provided by Elizabeth.

I purged the disks and memory of server.

Signed this file using ethereum account (ianworrall.eth), made a PR on github (cryptnotiq).