Zero-Knowledge Proof. About proving somebody knows some secret without revealing it Interactive: between the P rover & V erifier ( P and V or P eggy & V ictor ) Does not give away any information about the secret (zero-knowledge)
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- for x = s*ri mod n, check x2 v*ri2 mod n
- for y = ri mod n, check y2 ri2 mod n
- may find another key (it’s only a bit)
With no R1 from Bob …