Zero-Knowledge Proofs Without Crypto: A 30-Line Implementation
A quick look at zero-knowledge proofs
A developer explores zero-knowledge proofs through the classic graph 3-coloring problem, implementing a simple interactive proof in Python. The post walks through the protocol from a 1986 paper, explains the importance of nonces and hashing, and provides a live networked demo. It's a hands-on introduction that avoids cryptocurrency entirely, focusing on the graph theory and the elegance of the concept.
The idea of a zero-knowledge proof (ZKP) is that there are two parties: the prover and the verifier. The prover asserts that it has a solution to a (generally NP-complete) problem. The prover can convince the verifier of this without sharing the actual solution to the problem.