Zero knowledge proofs let someone show that a claim is true without sharing the private information that makes it true. The idea can support privacy and verification in blockchain systems, but it doesn’t make every transaction anonymous or every project secure. A zero knowledge proof is a cryptographic method in which a prover convinces a verifier that a statement is true while keeping the underlying secret hidden. The verifier checks the proof rather than receiving the secret itself. How much privacy or efficiency this provides depends on the system’s design and implementation.