Let us start with one question: What is zero knowledge proof blockchain?A zero-knowledge proof, sometimes also referred to as a ZK protocol, is a verification mETHod that takes place between a prover and a verifier. In a zero-knowledge proof system, the prover can demonstrate to the verifier that they have the knowledge of a specific piece of information (such as the solution to a mathematical equation) without revealing the information itself. Modern cryptographers can leverage these proof systems to offer higher levels of security and privacy.
Shafi Goldwasser and Silvio Micali first introduced the idea of a zero-knowledge proof in a 1985 MIT work. They demonstrated that it was possible to prove some properties of a number without revealing the number or any other details about it. This paper also introduced the mathematically significant finding that interactions between a prover and a verifier could lessen the amount of information required to prove a given theorem.
So, what is zero knowledge proof blockchain? A ZK proof must fulfill two basic requirements known as completeness and soundness. Completeness refers to the ability of the prover to demonstrate knowledge of the relevant information to a high degree of probable accuracy. For the proof to be sound, the verifier must be able to reliably determine whETHer or not the prover is actually in possession of the information. Finally, in order to be truly zero-knowledge, the proof must achieve both completeness and soundness without the information in question ever being communicated between the prover and the verifier.
Zero-knowledge proofs are typically employed in applications where privacy and security are crucial. Authentication systems, for example, can employ ZK proofs to verify credentials or identities without directly divulging them. As a simple example, it can be used to confirm that someone has a password to a computer system without revealing the password itself.
Let us back to the opening question: What is zero knowledge proof blockchain? One prominent real-world use case of zero-knowledge proofs is to be found in the world of cryptocurrency and blockchain technology. Using a type of proof known as a zero-knowledge Succinct Non-interactive Argument of Knowledge (zk-SNARK), privacy-focused cryptocurrencies such as Zcashare able to offer blockchain transactions with increased levels of privacy to their users. ETHereumis also working with zk-SNARK proofs since its Byzantium update in 2017.
