See shomari_attestation.txt in this directory for Shomari Prince's signed attestation.
Hash of the challenge file for verification:
14e4fe77 59391f2c 6988e790 2abd6343
cc27d259 80883aec 39a88d1e 415610b2
25e0aa5a c1ec9f5a 40b69989 4767ac75
983e5ca5 441ebbc6 ca66a61d 049c9112
response was based on the hash:
14e4fe77 59391f2c 6988e790 2abd6343
cc27d259 80883aec 39a88d1e 415610b2
25e0aa5a c1ec9f5a 40b69989 4767ac75
983e5ca5 441ebbc6 ca66a61d 049c9112
Hash of the response file for verification:
008a80a3 373a99ce 2c2f83e2 896147bb
f51cd431 128299cf eb36f85e 009e49ce
4da5ae54 601858e6 1bd4a4cd bebb0c63
247e7841 fa692b32 0856f9f7 aaf54640
Blake2b hash of the new_challenge file for participant #24:
7474dc21 f794d4ac fe75ceb7 36774ca0
5df34e59 40646583 c12d4f72 05f7cf40
aa45aef8 9f0da9ac f8ef1b4e b398638e
4dc84557 1a3e2e9f 1c92615d 68ba80d5
The above new_challenge file: https://ppot.blob.core.windows.net/public/challenge_0024
Shomari's attestation:
Date:
6-8 March 2020
Name:
Shomari Prince (https://sdot.io)
(signing keys: https://keybase.io/nyusternie)
Location:
Off-the-radar (but in plain sight)
Device(s):
MacBook Pro - 2.7 GHz Dual-Core Intel Core i5 - 8 GB 1867 MHz DDR3
~200 GiB NIFTY MiniDrive (micro SD)
Challenge hash:
14e4fe77 59391f2c 6988e790 2abd6343
cc27d259 80883aec 39a88d1e 415610b2
25e0aa5a c1ec9f5a 40b69989 4767ac75
983e5ca5 441ebbc6 ca66a61d 049c9112
Challenge file claims that it was based on the original contribution with a hash:
d49e62bd 44ce5741 48dcc541 05b52e71
d89b3466 834eeba0 609b2b39 dc8c6033
4929ad4c 73a36bca 0113ad70 c960e6ed
dacc9e93 67e19901 e6c92263 a4e8d3e0
- URL:
https://ppotus.blob.core.windows.net/public/challenge_0023
Software used to generate the response:
https://github.com/kobigurk/phase2-bn254/commit/bf852c168676a7afc5dd17b47ff9b8f394aeab8a
Response BLAKE2b hash:
008a80a3 373a99ce 2c2f83e2 896147bb
f51cd431 128299cf eb36f85e 009e49ce
4da5ae54 601858e6 1bd4a4cd bebb0c63
247e7841 fa692b32 0856f9f7 aaf54640
An image of the hash from the ceremony was uploaded to twitter:
https://twitter.com/ShomariPrince/status/1236738279371935749
Entropy source:
Attached an external keyboard to an unused MacBook, covered the <enter>
key with a hard-covered book and gave (3) random persons from my Regus
co-work space (60) seconds each of some stress relief.
Time taken:
~48 hours (first started 2020.3.6 @ ~2pm)
(restarted @ ~11pm after reducing the VeraCrypt container to AES-ONLY)
Side channel defenses:
Disconnected the Ethernet cable during the majority of the process;
and there's no working wifi on this device :-(
Other defenses:
(1) Stayed off-the-radar (but in plain sight)
(2) VirtualBox running Ubuntu 16.04
(3) ~200 GiB micro SD VeraCrypt (AES) container
(4) Device was locked in a private office during the entire computation
Post-processing:
(1) Copied Blake2b hash from CLI output of `compute_constrained`.
(2) Uploaded `response` file to 157.56.183.172 via SFTP.
(3) Shredded `challenge` and `response` files.
(4) Shutdown VM; then shredded VirtualBox folder.
(5) Shredded entire VeraCrypt partition.
(6) Shutdown the MacBook.
**DO NOT trust this response:**
My random selection of persons could have been compromised by:
NSA, GCHQ, and/or 8200; as I hardly know the (3) "entropy" sources.