GNU social JP
  • FAQ
  • Login
GNU social JPは日本のGNU socialサーバーです。
Usage/ToS/admin/test/Pleroma FE
  • Public

    • Public
    • Network
    • Groups
    • Featured
    • Popular
    • People

Embed Notice

HTML Code

Corresponding Notice

  1. Embed this notice
    Jan Wildeboer 😷:krulorange: (jwildeboer@social.wildeboer.net)'s status on Monday, 27-Jan-2025 03:53:42 JSTJan Wildeboer 😷:krulorange:Jan Wildeboer 😷:krulorange:
    in reply to
    • babble_endanger

    @babble_endanger If you want to dive *really* deep, here's the paper that describes the cryptographic details etc: https://eprint.iacr.org/2019/1416

    In conversationabout 4 months ago from social.wildeboer.netpermalink

    Attachments

    1. Domain not in remote thumbnail source whitelist: eprint.iacr.org
      The Signal Private Group System and Anonymous Credentials Supporting Efficient Verifiable Encryption
      In this paper we present a system for maintaining a membership list of users in a group, designed for use in the Signal Messenger secure messaging app. The goal is to support \(\mathit{private}\) \(\mathit{groups}\) where membership information is readily available to all group members but hidden from the service provider or anyone outside the group. In the proposed solution, a central server stores the group membership in the form of encrypted entries. Members of the group authenticate to the server in a way that reveals only that they correspond to some encrypted entry, then read and write the encrypted entries. Authentication in our design uses a primitive called a keyed-verification anonymous credential (KVAC), and we construct a new KVAC scheme based on an algebraic MAC, instantiated in a group \(\mathbb{G}\) of prime order. The benefit of the new KVAC is that attributes may be elements in \(\mathbb{G}\), whereas previous schemes could only support attributes that were integers modulo the order of \(\mathbb{G}\). This enables us to encrypt group data using an efficient Elgamal-like encryption scheme, and to prove in zero-knowledge that the encrypted data is certified by a credential. Because encryption, authentication, and the associated proofs of knowledge are all instantiated in \(\mathbb{G}\) the system is efficient, even for large groups.
  • Help
  • About
  • FAQ
  • TOS
  • Privacy
  • Source
  • Version
  • Contact

GNU social JP is a social network, courtesy of GNU social JP管理人. It runs on GNU social, version 2.0.2-dev, available under the GNU Affero General Public License.

Creative Commons Attribution 3.0 All GNU social JP content and data are available under the Creative Commons Attribution 3.0 license.