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Zero knowledge proofs https://en.wikipedia.org/wiki/Zero-knowledge_proof https://en.wikipedia.org/wiki/Zero-knowledge_proof

• bonyt 9y ago
  Expanding on that, zk-snarks[0], a kind of non-interactive zero-knowledge proof[1] are really interesting. They're used as the basis for the anonymous cryptocurrency zcash[2], where one can prove they haven't already spent an input without actually revealing which input they are spending. [0]: https://z.cash/technology/zksnarks.html https://z.cash/technology/zksnarks.html [1]: https://en.wikipedia.org/wiki/Non-interactive_zero-knowledge_proof https://en.wikipedia.org/wiki/Non-interactive_zero-knowledge... [2]: https://z.cash/ https://z.cash/