What is Zero-Knowledge Proof in Blockchain?

A zk-SNARK (Zero-Knowledge Succinct Non-Interactive Argument of Knowledge) is a cryptographic proof that allows one party to prove to another that they know a value without revealing the value itself.

A zero-knowledge proof is a cryptographic method by which one party can prove to another that a statement is true without revealing any information beyond the validity of the statement itself.

zk-STARK: Cryptographic proof for privacy and scalability, proving knowledge without revealing the value.

A zk-Rollup is a Layer 2 solution that bundles transfers using zero-knowledge proofs for scalability and privacy by validating transaction batches.