Update zero-knowledge-proofs.md

Author: linhuatan

src/content/zero-knowledge-proofs.md

@@ -43,7 +43,7 @@ In basic form, a zero-knowledge proof is made up of three elements: **witness**,
 
 - **Challenge**: The verifier randomly picks another question from the set and asks the prover to answer it.
 
-- **Response**: The prover accepts the question, calculates the answer, and returns it to the verifier. The prover’s response allows the verifier to check if the former really has access to the witness. To ensure the prover isn’t guessing blindly and getting the correct answers by chance, the verifier picks more questions to ask. By repeating this interaction many times, the possibility of the verifier faking knowledge of the witness drops significantly until the verifier is satisfied.
+- **Response**: The prover accepts the question, calculates the answer, and returns it to the verifier. The prover’s response allows the verifier to check if the former really has access to the witness. To ensure the prover isn’t guessing blindly and getting the correct answers by chance, the verifier picks more questions to ask. By repeating this interaction many times, the possibility of the prover faking knowledge of the witness drops significantly until the verifier is satisfied.
 
 The above describes the structure of an ‘interactive zero-knowledge proof’. Early zero-knowledge protocols used interactive proving, where verifying the validity of a statement required back-and-forth communication between provers and verifiers.