Zero-Knowledge Powered Private Groups (ZK Clue & Stealth Mode)
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Last updated
Last updated
As part of its privacy-first communication strategy, Sudo integrates Zero-Knowledge (ZK) technology to enable anonymous participation, proof-based access control, and identity-protected group interactions. This ensures users can engage in communities without revealing their personal or wallet identity while maintaining trust and authenticity through cryptographic verification.
ZK Clue is a privacy feature that allows users to verify on-chain or off-chain actions without revealing their actual identity. It enables users to interact in token-gated or activity-based communities while keeping wallet addresses and personal identifiers completely hidden.
Example Use Cases:
Anonymous Group Join: Join token-gated groups without exposing your wallet address.
Proof of Participation (PoP): Prove participation in a poll, governance vote, or event without disclosing your identity.
Quiz/Game ZK Rewards: Claim token rewards for quiz answers or game achievements without revealing your account details.
Content Access Control: Decrypt specific content only if you can provide a valid ZK proof of token ownership.
Stealth Mode extends privacy to active communication within groups and channels. When enabled, users can:
Appear in chat as "Anonymous" without exposing their wallet or username.
Still have every message cryptographically verified to ensure authenticity.
Encrypt and send files or media with ephemeral ZK-based access rights that expire after viewing.
This creates a safe environment for sensitive discussions while preserving verifiable message integrity.
Sudo’s ZK-powered groups are built on a layered privacy stack:
Identity Proof: Implemented using Semaphore and zkSNARK-based Merkle tree verification.
Encryption Layer: Messages and media encrypted via LibSignal combined with elliptic curve ephemeral key sharing.
Chat Engine: Sudo Chat Core extended with a ZK verification module.
Smart Contract Integration: A dedicated ZKVerifier.sol contract on EVM-compatible chains validates proofs without exposing identities.
No central server ever has access to a user’s full identity or wallet address.
Ideal for activist groups, whistleblower communities, and private DAO discussions.
Provides Sybil attack prevention without requiring full identity disclosure.
Allows communities to remain trust-based while preserving anonymity.
User connects their Web3 wallet.
A Zero-Knowledge proof is generated off-chain to confirm token ownership.
The proof is submitted to the ZKVerifier.sol smart contract.
If verified, the user gains group access under an anonymous identifier such as “Anonymous #1234.”
ZK-powered groups do not support custom usernames for anonymous members.
Moderation tools are limited to pre-set filters and role-based ZK permissions.
Optional cooldown periods can be enabled between anonymous messages to prevent spam or flooding.