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Attestation to response 0012

Date: 16 - 28 November 2019

Name: Aurélien Nicolas

Location: Tel Aviv

Device(s): QEDIT owned server (i7-6700K)

Challenge:

  • Blake2b:

challenge file contains decompressed points and has a hash: 88e35dfd 36f07671 4709c7ec 525ef84f e166d0e9 0e0c7ac0 047615c2 d0aed418 6a2c7fcd 6dd720b5 97895aee ae7e6c0c ae658143 b0e4ee3f 66fdc1b5 23e34b7a

challenge file claims (!!! Must not be blindly trusted) that it was based on the original contribution with a hash: 6957216b 02055954 92385d07 aa323ec2 c95e952f aa616ab6 5da1dd5e 20f030df 31da6932 42874cfb c8d10d00 77a08684 e2568528 995a0612 8c20f27d 370cc978

Software used: https://github.com/arielgabizon/powersoftau/commit/2bd49903bac07485fe23e5ef1a2d5fa19561977b

rustc 1.39.0 (4560ea788 2019-11-04) sha256=e68f193542c68ce83c449809d2cad262cc2bbb99640eb47c58fc1dc58cc30add

Response:

  • Blake2b:

The BLAKE2b hash of ./response is: b7053ddb 63c84adb 77747c88 54a5c793 f540ecd5 8165312c 47830a69 826a41e8 00ee705b e423a1c1 f2a1f3cb f5fa0160 7fbc35b2 62c7c256 128f2bff bed01aa9

  • URL:

Entropy sources: urandom, various blobs of text, and obligatory keyboard mashing.

Time taken: roughly 10 hours

Side channel defenses: none

Postprocessing:

  • Verified on the same machine using verify_transform_constrained:

Verification succeeded! Writing to ./new_challenge... Here's the BLAKE2b hash of the decompressed participant's response as new_challenge file: 24eca23f 32160fd4 6b7f103f 163bd0e6 8b0f8537 79d62154 39a0af20 5a6cb170 e27fc2d2 e05fd973 74a0188c c7b5deb2 cbf45d06 44314bfc 8e89573b 09f3a1f3

  • I copied the Blake2b hash from the CLI output of compute_constrained
  • I uploaded the response file over SSH to a server provided by Ariel Gabizon.