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Also known as: ZKP
A cryptographic method to prove a statement is true without revealing any information beyond the statement’s truth.
DESCRIPTION
Zero-knowledge proofs allow a prover to convince a verifier that a claim holds while revealing nothing else. Constructions include interactive and non-interactive protocols, with practical variants like zk-SNARKs and zk-STARKs enabling succinct, efficient verification. Applications range from privacy-preserving authentication to scalable blockchains and regulated data sharing. Important considerations include setup assumptions, soundness, completeness, and zero-knowledge properties, as well as performance trade-offs.
ALTERNATIVE DEFINITIONS
Wikipedia
In cryptography, a zero-knowledge proof or zero-knowledge protocol is a method by which one party can prove to another that a given statement is true, without conveying any information apart from the fact that the statement is indeed true.
Highlights information-theoretic property of revealing nothing beyond truth.
Cloudflare
A zero-knowledge proof allows one party (the prover) to prove to another party (the verifier) that they know a secret, without revealing the secret.
Uses intuitive prover-verifier framing for practical understanding.
RELATED TERMS
Interactive Proof zk-SNARK zk-STARK Commitment Scheme Non-Interactive Zero-Knowledge Asymmetric Encryption Blockchain Authentication
COMPETING TERMS
Multi-Party Computation Homomorphic Encryption
KNOWLEDGE AREAS
Data Security Data Privacy & Compliance Mathematics AI
TARGET AUDIENCE
Security Architect Software Developer Data Privacy Officer Chief Information Security Officer AI Engineer
EXTERNAL SOURCES
- Wikipedia - Zero-knowledge proof
- ZKProof - Community standards and references for ZKPs
- IACR ePrint - Academic paper on zkSNARKs/zero-knowledge
- Cloudflare - Introductory ZKP explanation with examples
TOP QUESTIONS
What is a Zero-Knowledge Proof in simple terms?
It’s a way to prove you know something without revealing what you know. Only the truth of the statement is exposed.
Category: Basics
How do zk-SNARKs relate to Zero-Knowledge Proofs?
zk-SNARKs are a practical, succinct, non-interactive form of ZKPs requiring a trusted setup. They enable fast verification.
Category: Concept
Where are Zero-Knowledge Proofs used today?
They’re used in privacy-preserving blockchains, anonymous credentials, selective disclosure, and secure authentication schemes.
Category: Application
What are the security properties of Zero-Knowledge Proofs?
Completeness, soundness, and zero-knowledge ensure valid proofs convince verifiers without leaking extra information.
Category: Theory
What is the main performance challenge with Zero-Knowledge Proofs?
Generating proofs can be computationally expensive. New constructions and hardware acceleration are reducing costs.
Category: Limitations
How do Zero-Knowledge Proofs compare to Multi-Party Computation?
ZKPs prove statements about secrets; MPC jointly computes over secrets. They’re complementary privacy technologies.
Category: Comparison
Are Zero-Knowledge Proofs compatible with regulation?
Yes, they can enable privacy-preserving compliance via selective disclosure and verifiable attestations.
Category: Compliance
What is a trusted setup and why is it controversial?
Some ZKP systems need secret parameters generated securely. Trust assumptions and ceremonies are critical and debated.
Category: Risks
What is a hot topic around Zero-Knowledge Proofs?
zk-STARKs and hardware acceleration for faster, scalable proofs are active research and engineering areas.
Category: Topic