Core Concepts

Zero-Knowledge Proofs

Zero-knowledge proofs allow one party to prove to another that a statement is true without revealing any information beyond the validity of the statement itself.

In Untraced:

• User proves they own an email without revealing the email address

• User proves they're over 18 without revealing their exact age

• User proves they have GitHub activity without revealing commit history

The smart contract only knows: VERIFIED = true. Nothing else.

Verification Modules

Untraced supports five verification modules:

Module	ID	OAuth	Description
Email	zk-email	No	Verify email ownership
Age	zk-age	No	Prove age threshold
GitHub	zk-github	Yes	Verify GitHub activity
Twitter	zk-twitter	Yes	Verify Twitter/X account
Balance	zk-balance	No	Prove wallet balance

Each module can be configured with specific parameters (minimum age, commit count, etc.).

On-Chain Attestations

Attestations are EIP-712 signed messages that prove verification:

{
  user: "0x1234...",           // User's wallet address
  moduleType: "0xabcd...",     // keccak256 hash of module ID
  expiry: 1234567890,          // Unix timestamp
  nonce: 1234567890,           // Unique nonce
  signature: {
    v: 27,
    r: "0x...",
    s: "0x..."
  }
}

Attestations are valid for 30 days and can be verified on-chain through the registry contract.