What Zero-Knowledge Proofs Are·Lesson 4 of 33·9 min
Interactive vs. Non-Interactive Proofs
This lesson is for enrolled learners
The concept The earliest zero-knowledge proofs were conversations. The verifier sent a random challenge, the prover answered, and after enough rounds the verifier was convinced. Those are interactive proofs. They are easier to understand and, in some models, easier to prove secure, but they are a poor fit for a blockchain: a contract cannot have a back-and-forth with a user……
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