--- title: "ZK Proof (Zero-Knowledge Proof)" url: "https://www.unknowngravity.com/en/glosario/zk-proof-zero-knowledge-proof" site: Unknown Gravity published: "2025-06-07T15:35:12+00:00" modified: "2026-07-15T10:51:28+00:00" language: en-US description: "Un ZK Proof (Zero-Knowledge Proof) is an advanced cryptographic technique that allows a party (the tester) demonstrate to another party (the verifier) that a certain statement is true, without…" section: "Home > ZK Proof (Zero-Knowledge Proof)" --- # ZK Proof (Zero-Knowledge Proof) GLOSSARY · BLOCKCHAIN & WEB3 A cryptographic method that allows you to prove that a statement is true without revealing the information behind it. WHAT IS IT? · FOR DUMMIES A **ZK Proof** is a way of showing that you know something or that something is true, **without saying exactly what that something is**. It's as if you can convince someone that you have the right password without showing the key. In the world of blockchain, it serves to maintain your privacy when making transactions or verifying information without sharing your data. WHAT IS IT? · PRO A **ZK Proof** (Zero-Knowledge Proof) is an advanced cryptographic technique that allows a party (the **tester**) demonstrate to another party (the **verifier**) that a certain statement is true, **without disclosing any additional data** about the statement itself. This key property allows **verify the validity of information without having to state its content**, making ZK Proofs a fundamental tool for preserving **privacy, security and efficiency** in decentralized systems. There are two main types of ZK tests: - **ZK-Snarks** (Succinct Non-Interactive Argument of Knowledge): compact, quick to verify, but require a trusted setup. - **ZK-Starks** (Scalable Transparent Argument of Knowledge): more scalable and without the need for trusted setup, but with a larger test size. In the context of **blockchain**, ZK Proofs are primarily applied to: - Validate private transactions without disclosing amounts or participants (as in Zcash). - Implement **ZK Rollups**, a Layer 2 scaling solution where multiple off-chain transactions are processed and only one test is published on the main network, ensuring efficiency and security. - Authentication and identity verification without the need to expose personal data (KYC without revealing identity). - Evidence of inclusion or membership (such as showing that you are on a whitelist without showing your address). This technology makes it possible to balance two traditionally opposing principles: **transparency inherent to blockchain** And the **user privacy**, opening the door to business, financial, regulatory and social use cases that require confidentiality without renouncing decentralization or mathematical verifiability. ## 01 / Key points - It is a technique that allows us to verify something without revealing the information itself. - Widely used in blockchain for privacy, scalability and data-free verification - There are variants such as zk-SNARKS and zk-STARKS - Fundamental to Layer 2 solutions such as ZK Rollups - Allows verifiable identity without exposing personal data ## 02 / Advantages - **Improved privacy**: Protects sensitive data in public environments - **Efficiency in blockchain**: reduces the size of published data - **Strong mathematical security**: based on rigorous cryptographic testing - **Real scalability**: allows you to consolidate thousands of transactions in a single test - **Wide range of applications**: from DeFi and KYC to digital identity and gaming ## 03 / Disadvantages - **High technical and computational complexity** in the generation of tests - **High computing time** in some algorithms - **Trusted setup dependency** in certain implementations (such as SNARKs) - **Steep learning curve** for developers - **Limited support even in traditional development environments** RELATED CONCEPTS [Cryptocurrency](/en/glosario/criptomoneda) [Blockchain](/en/glosario/blockchain) [Smart contract](/en/glosario/smart-contract) [Smart Contract](/en/glosario/smart-contract-contrato-inteligente) [Digital identity](/en/glosario/identidad-digital) [Layer 2](/en/glosario/layer-2-capa-2) KEEP LEARNING [How to protect your digital assets in the cryptocurrency world](/en/articulos/como-proteger-tus-activos-digitales-criptomonedas) [How Blockchain is Transforming the Agri-Food Sector](/en/articulos/blockchain-sector-agroalimentario) [Tokenization without legal problems in Spain and Europe: What you need to know before you start](/en/articulos/tokenizacion-sin-problemas-legales-lo-que-debes-saber-antes-de-empezar) [What Do Blockchain Developers Do?](/en/articulos/que-hacen-los-desarrolladores-blockchain) [How to convert Web2 users to Web3 without them running](/en/articulos/como-convertir-usuarios-web2-en-web3-sin-que-salgan-corriendo) RELATED SERVICES [Blockchain protocol development](/en/servicios/desarrollo-de-protocolos-blockchain) [Digital Identity Management](/en/servicios/blockchain-para-gestion-de-identidades-digitales) [Blockchain consulting for companies](/en/servicios/consultoria-blockchain) [Web3 Development](/en/servicios/desarrollo-web3) [Smart contract auditing](/en/servicios/blockchain-security-audits) [Full glossary](/en/glosario) This entry is informative. It is not legal, tax or investment advice. The rules cited change: check the current version on [BOE](https://www.boe.es) and [EUR-Lex](https://eur-lex.europa.eu).