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See yingtong_attestation.txt in this directory for Ying Tong's signed attestation.

Hash of the challenge file for verification:

    05985261 72c5fece a3ff71a5 5af41344
    42569917 25ad3148 1231c4cf 765d9ecd
    9fd681c4 f7a25717 bb2eab34 49bb4417
    059498b9 f5a5e4ba b630424f 2c0d3605

response was based on the hash:

    05985261 72c5fece a3ff71a5 5af41344
    42569917 25ad3148 1231c4cf 765d9ecd
    9fd681c4 f7a25717 bb2eab34 49bb4417
    059498b9 f5a5e4ba b630424f 2c0d3605

Hash of the response file for verification:

    e4ee7ebc 787ec108 af7597d6 868c8df1
    d9cc4d97 e5ef8beb 9d94f055 c8a9d651
    bd1d7b0f 1f8bdb6e 4a9ab754 c72ad6ca
    3df58aa3 c9976a98 8163f527 17116f6e

Blake2b hash of the new_challenge file for participant #45:

    c13dedda 076022e6 be2d634d a910930c
    2154b002 99d4db5c 5462f13f d5fb19f4
    8cda31bb 63e65a6f cdc6b482 0cc6a4ad
    dbfe7ed2 446beab8 b63b7214 1fdc0c80

The above new_challenge file: https://ppot.blob.core.windows.net/public/challenge_0045

Ying Tong's attestation:

Attestation to response 0044

Date: Wed Jun 24 2020 - Thu Jun 25 2020 Name: Ying Tong Location: Singapore Device: Linux system76-pc 5.4.0-7626-generic #30158816988320.04bbe668adev-Ubuntu SMP x86_64 GNU/Linux Commit Hash: bf852c168676a7afc5dd17b47ff9b8f394aeab8a Challenge: URL: https://ppotus.blob.core.windows.net/public/challenge\_0044

Calculating previous contribution hash...
`challenge` file contains decompressed points and has a hash:
	05985261 72c5fece a3ff71a5 5af41344 
	42569917 25ad3148 1231c4cf 765d9ecd 
	9fd681c4 f7a25717 bb2eab34 49bb4417 
	059498b9 f5a5e4ba b630424f 2c0d3605 
`challenge` file claims (!!! Must not be blindly trusted) that it was based on the original contribution with a hash:
	60df61e1 f6d84fb3 8f14d515 1f5f02a8 
	45fb9baa 97abaee7 7fbc743a 0dcbc59b 
	6886f6dc 51720340 a6387b5a d172b003 
	d9700d11 6f24ab12 eb722036 b3da1e04

Response:

The BLAKE2b hash of `./response` is:
        e4ee7ebc 787ec108 af7597d6 868c8df1 
        d9cc4d97 e5ef8beb 9d94f055 c8a9d651 
        bd1d7b0f 1f8bdb6e 4a9ab754 c72ad6ca 
        3df58aa3 c9976a98 8163f527 17116f6e

Time taken Download: (did not document download time) Execution: about 24 hrs Upload: about 2 hrs

Entropy Sources: Quantum random numbers server (provided by Australian National University): https://qrng.anu.edu.au/

Side channel defences: None Postprocessing: Rebooted the machine