| commit | e1220b40f5e6e540b7d695b7f9e6f2c394553288 | [log] [tgz] |
|---|---|---|
| author | Kevin Graney <kmg@google.com> | Tue May 30 10:21:08 2023 -0400 |
| committer | Kevin Graney <kmg@google.com> | Tue May 30 10:23:04 2023 -0400 |
| tree | ff80f136457a035fbc9a3df80e00eafcc9ed7b86 | |
| parent | ac7650269463beb0cfb4c26ebf79344f210d5da4 [diff] |
Import content from http://ag/23451840 Squashed commit of the following: commit 00c2b21c8fa9004aa697c01961c46fe0329cffe8 Author: Kevin Graney <kmg@google.com> Date: Tue May 9 14:39:03 2023 -0400 Add TEST_MAPPING commit ed8ac8d9261350a5387039f36027584491e04745 Author: Kevin Graney <kmg@google.com> Date: Tue May 9 10:48:45 2023 -0400 Depend on private-join-and-compute abseil commit 1907d032ccf04e256a3900d0db55d56e861f0ba6 Author: Kevin Graney <kmg@google.com> Date: Thu May 4 15:48:54 2023 -0400 Fix METADATA filename typo commit b77a752a66406082974f12ee3455742337e02f85 Author: Kevin Graney <kmg@google.com> Date: Thu May 4 10:24:04 2023 -0400 Add build rules commit 132bec1222d439625cf8ae692c03ce518945cba2 Author: Kevin Graney <kmg@google.com> Date: Thu May 4 10:24:26 2023 -0400 Add abseil commit 410c261bf1629f65651d2b7bc53a188e5dba2211 Author: Kevin Graney <kmg@google.com> Date: Tue Apr 25 13:27:39 2023 -0400 Add metadata files commit 827d2aa796804f9ed28fc1c35ada56e0c62800be Author: Karn Seth <karn@google.com> Date: Wed Apr 19 11:12:58 2023 -0400 initial commit Change-Id: I8f92eeb3857f7e65fdf495e76a4967ae69ed5878
An anonymous counting token (ACT) scheme allows Clients to obtain blind signatures or MACs (aka tokens) on messages of their choice, while at the same time enabling Issuers to enforce rate limits on the number of tokens that a client can obtain for each message. Specifically,
This repository implements a variant of the scheme described in [1], which is secure in the random oracle model under the q-DDHI assumption (in a cyclic group) and the DCR assumption. The variant implemented here relaxes the proven soundness guarantee to the non-concurrent setting. It also assumes that the server generates its parameters correctly. Future versions will support server proofs for correct parameter generation.
This implementation also supports batched token issuance. Batched token issuance can have significant performance benefits as compared to individual token issuance.
[1] “Anonymous Counting Tokens.” Fabrice Benhamouda, Mariana Raykova, Karn Seth.
This repository requires Bazel. You can install Bazel by following the instructions for your platform on the Bazel website.
Once you have installed Bazel you can clone this repository and run all tests that are included by navigating into the root folder and running:
bazel test //...
This is not an officially supported Google product. The code is provided as-is, with no guarantees of correctness or security.