An o1js implementation of the Semaphore protocol: a zero-knowledge protocol that allows you to cast a signal and prove you are a member of certain group without revealing your identity.
See: https://semaphore.pse.dev/
Community Proposal: Semaphore: Zero-Knowledge Signaling on Ethereum
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Kobi Gurkan (Ethereum Foundation and C Labs) Koh Wei Jie (Ethereum Foundation) Barry Whitehat (Independent) February 2, 2020
To Mixers and Beyond: presenting Semaphore, a privacy gadget built on Ethereum:
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Koh Wei Jie - Sep 2, 2019