The Zelyo Protocol
Verifiable credentials, sealed with the gravity of a printed record.
Prove one fact about a credential in zero knowledge. The chain records only a nullifier — never who you are.
Reveal I
Nothing personal on-chain
A verification writes only a zero-knowledge proof and a nullifier hash to the ledger. No name, no grade, no email ever touches the chain — inspect any transaction on the public explorer and see for yourself.
Reveal II
One credential, one registration
The same credential can prove a fact only once per scope. A second proof reuses the nullifier and the registry contract rejects it on-chain. That rejection is the Sybil block — enforced by mathematics, not by trust.
Reveal III
Selective disclosure unlocks a claim
Disclose a single fact — your track — while name and grade stay sealed. A valid proof against a public gate unlocks a Stellar-native reward bound to your wallet.