Un ZK Proof it's 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.

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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 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.

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