Everyone in crypto wants to build a trusted on-chain reputation without revealing personal data.

zkPass made this possible with its Verifiable Reputation Score (VRS) using zkTLS technology, which enables private, credible, and composable reputation building


TL;DR

  • VRS = an aggregated, auditable reputation score made from zero-knowledge proofs (zkTLS + other proofs) that prove a user’s off-chain footprints/external attestations without revealing personal data.

  • Integrating VRS into Ethos would augment wallet score, social attestations, vouches, and reviews with privacy-preserving, cryptographic proofs — improving verifiability and sybil resistance while keeping private details secret.

  • Implementation = zk proof generation off-chain → submit succinct zk proof + score delta on-chain → Ethos verifier contract updates a public reputation state (e.g., SBT or on-chain score).



What is VRS (quick definition)

VRS here = Verifiable Reputation Score: a numeric (or vector) reputation derived from multiple proof types (internet footprint verifications via zkTLS, social attestations, reviews, vouches, wallet behavior) where each input is accompanied by a zero-knowledge proof that the input is valid — but reveals only the minimal binding data (e.g., “I control this Twitter account” or “this email domain has these properties”), not the actual private identifiers.

How zkPass’s VRS (zkTLS proofs) would fit into Ethos


1) Inputs

  • zkTLS proofs from zkPass: prove statements about your internet footprint (e.g., control of an account, presence on a forum, ownership of an email domain, or action history) without disclosing identity details.

  • Ethos inputs: wallet score, social attestations, review impact, vouches, transactional behavior.

2) Off-chain aggregation

  • User generates a set of zk proofs locally (or via a client) for each external claim (e.g., “I have 3 months of activity on forum X”, “I control twitter handle Y”).

  • A reputation aggregator/relayer (or the user's client) composes these proofs and produces an aggregated VRS proof or discrete small proofs per attestation.

3) On-chain verification

  • Submit the zk proof(s) to an Ethos verifier smart contract (a zk-SNARK/zk-STARK verifier) that:

  • Verifies the proof(s) cryptographically.

  • Extracts the authorized score delta (or a compressed vector of reputation attributes) encoded in the proof’s public inputs.

  • Updates the user’s on-chain reputation record (e.g., a reputation mapping or an SBT representing reputation buckets).

4) Score fusion

  • Ethos merges VRS deltas with existing signals (wallet score, vouches, reviews) using a transparent weighting policy (governed on-chain or by DAO).

Example data flow (step-by-step)

  1. User connects an external service via zkTLS-authorized flow in zkPass client.

  2. zkPass client proves “I control X and met condition Y” to produce a zk proof (proof contains a public output like attestation_id + score_weight).

  3. Client sends the proof to a relayer that calls Ethos verifier contract with proof + user wallet address.

  4. Ethos verifier validates proof; on success the contract emits VRSUpdated(user, delta, source).

  5. Ethos scoring oracle recalculates consolidated reputation (on-chain) and stores it or mints/updates an SBT.

How zkTLS proofs strengthen trust while preserving privacy

  • zkTLS allows proving bound statements about TLS sessions or external service responses without revealing the session contents. Example proofs:

    • “This wallet created and signed an account registration on forum X” (without revealing username).

    • “This e-mail domain performed validations proving it’s a business domain” (without giving the actual e-mail).

  • Because proofs are zero-knowledge, Ethos gets cryptographic assurance that the attestation is real, but no PII is disclosed on-chain or to third parties.

On-chain design patterns & technical pieces

  • Verifier contract(s): zk verifier(s) for proof types. Public inputs include address identifier + score delta or attribute vector.

  • Reputation registry: mapping(address => ReputationStruct) or SBTs representing buckets (non-transferable).

  • Attestation anchoring: optional anchor of attestation roots (Merkle roots) on-chain for auditability without leaking details.

  • Relayer pattern: for gas abstraction, proofs submitted via relayers that can be sponsored.

  • Rate-limits & replay protection: include epoch and nonce in public proof inputs to prevent replay.

  • Upgradeability: keep scoring weights and verifier addresses upgradable via governance DAO.

Why it matters

Reputation is the missing layer in Web3.

With zkPass and Ethos, users could finally carry credible reputation across chains and platforms, built from proofs instead of profiles.

The future

Every verified proof, every vouch, and every impact review enhances your trust score, publicly verifiable and privately secured.

This is how Web3 builds trust without compromising privacy. 🔐✨

zkPass and Ethos together could become the standard for decentralized reputation, transparent, privacy-preserving, and truly owned by the user.