[Resource Topic] 2001/086: Statistical Zero-Knowledge Proofs from Diophantine Equations

Welcome to the resource topic for 2001/086

Title:
Statistical Zero-Knowledge Proofs from Diophantine Equations

Authors: Helger Lipmaa

Abstract:

A family (S_t) of sets is p-bounded Diophantine if S_t has a
representing p-bounded polynomial R_{S,t}, s.t. x\in S_t \iff (\exists y)[R_{S}(x;y)=0]. We say that (S_t) is unbounded
Diophantine if additionally, R_{S,t} is a fixed t-independent
polynomial. We show that p-bounded (resp., unbounded) Diophantine
set has a polynomial-size (resp., constant-size) statistical
zero-knowledge proof system that a committed tuple x belongs to
S. We describe efficient SZK proof systems for several
cryptographically interesting sets. Finally, we show how to prove in
SZK that an encrypted number belongs to S.

ePrint: https://eprint.iacr.org/2001/086

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