See youssefelhousni_attestation.txt in this directory for Youssef El Housni's signed attestation.
Hash of the challenge file for verification:
3e1140e5 66971cbd e6308dc3 d3f2ef4e
2c36bb4d b16704ed 0ffd26ee 7d80ccce
f2b46aa4 6feadf3e 2da8c43e ccf7588a
09e6cd94 85a4dd05 20af752d b0f24128
response was based on the hash:
3e1140e5 66971cbd e6308dc3 d3f2ef4e
2c36bb4d b16704ed 0ffd26ee 7d80ccce
f2b46aa4 6feadf3e 2da8c43e ccf7588a
09e6cd94 85a4dd05 20af752d b0f24128
Hash of the response file for verification:
f34b3fe3 bf71c731 424d0b95 16ac3751
a2250b26 23648f74 58361bce 9616a233
e5aef57e 8cdd0f3c 555e1e0e e4feeace
c5f2342b 860d0975 4c450972 72d99b26
Blake2b hash of the new_challenge file for participant #8:
10e6b25c 4b066b59 a5b837d2 460a78b1
59edb6cb 2018ae0a a74b7555 499c9690
b16b4f38 99fa8147 b9bc4602 5b634eef
8e998fa2 44f9fe64 4df29ee9 a0944e7a
The above new_challenge file: https://ppot.blob.core.windows.net/public/challenge_0008
Youssef's attestation (from youssefelhousni_attestation.txt):
Date: 05-06 October 2019
Name: Youssef El Housni
Location: Paris, France
Device(s): an OVH VM (8 vCPU, 32GiB memory) running Ubuntu 16.0
Challenge hash:
3e1140e5 66971cbd e6308dc3 d3f2ef4e
2c36bb4d b16704ed 0ffd26ee 7d80ccce
f2b46aa4 6feadf3e 2da8c43e ccf7588a
09e6cd94 85a4dd05 20af752d b0f24128
Response BLAKE2b hash:
f34b3fe3 bf71c731 424d0b95 16ac3751
a2250b26 23648f74 58361bce 9616a233
e5aef57e 8cdd0f3c 555e1e0e e4feeace
c5f2342b 860d0975 4c450972 72d99b26
URL: https://ppot.blob.core.windows.net/public/challenge_0007
Software used to generate the response: https://github.com/kobigurk/phase2-bn254/commit/bf852c168676a7afc5dd17b47ff9b8f394aeab8a
Entropy source: I used multiple invocations of a random number generator seeded with the FSB (Fast Syndrome-Based) hash of Yutaka Taniyama suicide note written in Japanese.
Time taken: ~12 hours
Side channel defenses: none.
Postprocessing:
- I copied the Blake2b hash from the CLI output of compute_constrained
- I did not reboot the VM
- I uploaded the response file to to Azure Blob storage as response under participant 7 using sftp
- I've deleted challenge and response files.
Do not trust this response. I neither guarantee that I discarded the toxic waste, nor that an adversary has not gotten hold of it.