Zelyo
Privacy-preserving credentials with zero-knowledge proofs — prove a single claim like a certification without revealing the underlying document or any personal data.
Identity and skills verification today forces people to over-share personal documents — IDs, diplomas, resumes — with issuers, platforms, and employers, creating centralized honeypots of PII and giving individuals no control once that data is shared.
The solution
Zelyo replaces this with zero-knowledge proofs. Issuers mint tamper-proof credentials as leaves in a Merkle tree anchored on Stellar Soroban smart contracts; holders store their credentials locally (encrypted, client-side, via WebCrypto/IndexedDB) and generate in-browser ZK proofs using Noir/Barretenberg; and verifiers confirm a single specific claim — “holds this certification” — without ever seeing the underlying document, name, or personal data. Only a nullifier and a wallet-bound address are recorded on-chain to prevent Sybil attacks and credential reuse.
Built on Stellar
A genuinely native Soroban use case: on-chain Merkle-root anchoring and wallet-bound nullifiers for privacy-preserving identity showcase Stellar’s smart-contract capability beyond payments — a credentialing primitive other Stellar dApps (DAO gating, reputation, KYC-lite) could reuse. Aimed at freelancers, professionals, and anyone crossing borders.