Zero-Knowledge Proof (ZKP): Zero-Knowledge Proof is a cryptographic method that allows one party (the prover) to prove to another party (the verifier) that they possess certain information without revealing the actual details of that information. This concept is fundamental to privacy-focused technologies and protocols within the cryptocurrency space, such as zk-SNARKs (Zero-Knowledge Succinct Non-Interactive Arguments of Knowledge) used in privacy coins like Zcash.