Zupass, identity and credentials beyond proof of personhood
summary
Zupass is a zero‑knowledge data manager actively used for event check‑ins, anonymous hackathon voting (EthBerlin prizes awarded), Devcon Q&A submissions, anonymous Telegram posting for ticket holders, distributed clinical trial participation, and an anonymous Run Club leaderboard — all proving membership without revealing identity. It ships a data format pod (provable object data), a proof system GPC (general purpose circuits) and a browser SDK zapi that mints/verifies community‑issued tokens (e.g. frog crypto) and runs ZK proofs client‑side.
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