Hash of the challenge file for verification:
7fde382d 1bc12ae7 d3d99879 648e416b
0540f39d 5e8f4945 229a7faa e97c3630
9d54bf8b b8a0813c 67f89d19 9b2111b9
0adb93c2 6b80fdd4 e3fe3640 860b7731
response was based on the hash:
7fde382d 1bc12ae7 d3d99879 648e416b
0540f39d 5e8f4945 229a7faa e97c3630
9d54bf8b b8a0813c 67f89d19 9b2111b9
0adb93c2 6b80fdd4 e3fe3640 860b7731
Hash of the response file for verification:
ed65fac5 4967c6ee abfd8350 2eceb53c
a7ccd0bf d35353ee c5350c37 06988b8b
f1590b10 fe8388ab fbeb088c 8843fb80
4fe885d6 0bd6d8fb 7cd47eef c93b778b
Blake2b hash of the new_challenge file for participant #11:
ac890865 8234b4f0 b8f4e3c3 0f6acc34
38d3f297 734b62b9 c7b1157f 93d7eed2
ba05c59d e663cebc 08049076 3cfbee1e
5e231123 7714661e 67b43cca 921da027
The above new_challenge file: https://ppot.blob.core.windows.net/public/challenge_0011
Vano's attestation (from power_vano_attestation.txt):
Attestation to response 0009
Date: 21-23 October 2019
Name: Vano Narimanidze (Power_VANO) (Country Lead of Georgia for Horizen, President and Co-founder of Association Blockchain Georgia)
Location: Physical location of me and the computation machine has been different, intentionally
Device(s): Microsoft Azure VM (Standard D16s v3 (16 vcpus, 64 GiB memory)) running Ubuntu 18.04 hosted on a seperate cloud account
Challenge Blake2b:
7fde382d 1bc12ae7 d3d99879 648e416b
0540f39d 5e8f4945 229a7faa e97c3630
9d54bf8b b8a0813c 67f89d19 9b2111b9
0adb93c2 6b80fdd4 e3fe3640 860b7731
URL: https://ppot.blob.core.windows.net/public/challenge_0010
`challenge` file claims that it was based on the original contribution with a hash:
2f21e33e d267b2c5 31fbafb1 89beb370
a30166bf f9d97c02 42b7f3fc c650022c
61868f0e b2000578 d852fb4a 71ceb9e9
49337de4 9ec3ac48 1f2092db aac7a1de
Software used: https://github.com/matter-labs/powersoftau/commit/1ff12d0529eab47e40bf7fe7a1bb576a1df4e46e
Response Blake2b:
ed65fac5 4967c6ee abfd8350 2eceb53c
a7ccd0bf d35353ee c5350c37 06988b8b
f1590b10 fe8388ab fbeb088c 8843fb80
4fe885d6 0bd6d8fb 7cd47eef c93b778b
Entropy sources: I have used the last four block hashes from Horizen blockchain at the time of calculation + the last block hash of Bitcoin blockchain + random key mash on keyboard.
Time taken: around 9 hours
Side channel defenses: I have not told anyone what I was going to do. The VM had disk encrypted.
Postprocessing:
I copied the Blake2b hash from the CLI output of compute_constrained;
I did not reboot the VM;
I uploaded the response file as "response" using SFTP to the server provided by Wei Jie.
I rebooted the VM;
I deleted the VM.