Add Justin Drake's attestation.

0023/README.md

@@ -0,0 +1,8 @@
+# Justin Drake
+
+* Mailing list post: <https://lists.z.cash.foundation/pipermail/zapps-wg/2017-December/000108.html>
+* See `./report.asc` for a signed attestation.
+
+Response file:
+
+* https://powersoftau-transcript.s3-us-west-2.amazonaws.com/404692df729de3c74a112131a25ab5ca6a30237d01247d312c085ae1ed7308752c06018c1e6a5721b646557ca0a95d6921374cb40fed7c355d063cbe785066eb

0023/report.asc

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+-----BEGIN PGP SIGNED MESSAGE-----
+Hash: SHA256
+
+Powers of Tau Operational Writeup
+=================================
+
+Round: 23
+Date: 2017-12-04
+Name: Justin Drake
+Location: Cambridge, UK
+
+BLAKE2b-64 (challenge) =
+732e2f7ce5f19334bd85a4d921640c5f2e294e2a5f8953c252c59f0b051f4d3bc45b62c66fd00df038e6fff93652a83afea80a374e726823900a807e32e49e48
+
+BLAKE2b-64 (response) =
+404692df729de3c74a112131a25ab5ca6a30237d01247d312c085ae1ed7308752c06018c1e6a5721b646557ca0a95d6921374cb40fed7c355d063cbe785066eb
+
+Bounty
+======
+
+I am offering 5 ETH (about 2,300 USD at the time of writing) to the first
+person who can recover the randomness for my part of the ceremony. The
+bounty is valid until 31 December 2023.
+
+More Details
+============
+
+https://bitbucket.org/dchest/b2sum
+commit 1b4dd7de03a975b6134b874646c0272214229ac1
+
+https://github.com/ebfull/powersoftau
+commit d47a1d3d1f007063cbcc35f1ab902601a8b3bd91
+
+rustc --version
+rustc 1.22.1 (05e2e1c41 2017-11-22)
+
+cargo --version
+cargo 0.23.0 (61fa02415 2017-11-22)
+
+https://pgp.mit.edu/pks/lookup?op=get&search=0x186C53583A3C1588
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+-----END PGP SIGNATURE-----

README.md

@@ -22,6 +22,7 @@
 20. [Zaki Manian](./0020/) [[report.asc]](./0020/report.asc) 311cacac3e74009d452b54c110980a179dfdaee124bc7a79d2713a27922f35dbc054d7bdea4d12a6359a39c85906e684590660aa5e21b07edf743f19914df9e9
 21. [Rudi Cilibrasi](./0021/) [[report.asc]](./0021/report.asc) 81cde8d54b0b7e37f72112ea3779698229ff8eab330acec9c4bc8b1c1968006464b8c7797c91b3e62b1b0dec37d7899ce7be96c990ff12b7719e6926bc22523b
 22. [Paul Gerhardt](./0022/) e7d1f35b2ed30944377dd495e8e8e87626450b7d9fe9269c1b3a02a751452047eee17127a4808fb526463cc01974cca00b4107fd7f4ef5c0f17c59d17797572b
+23. [Justin Drake](./0023/) [[report.asc]](./0023/report.asc) 404692df729de3c74a112131a25ab5ca6a30237d01247d312c085ae1ed7308752c06018c1e6a5721b646557ca0a95d6921374cb40fed7c355d063cbe785066eb
 
 ## License