Question 47
47. In Challenge-Response authentication the claimant ________.
Answer : (1) Proves that she knows the secret without revealing it | Previous | Next |
| UGC NET CS 2018 July - II Question 46 | UGC NET CS 2018 July - II Question 48 |
In cryptography, a zero-knowledge proof or zero-knowledge protocol is a method by which one party (the prover) can prove to another party (the verifier) that they know a value x, without conveying any information apart from the fact that they know the value x. The essence of zero-knowledge proofs is that it is trivial to prove that one possesses knowledge of certain information by simply revealing it; the challenge is to prove such possession without revealing the information itself or any additional information
Example:
WHAT IS ZERO KNOWLEDGE AUTHENTICATION?
Zero-knowledge authentication is when a prover convinces a verifier that she is in possession of an identifying secret, without revealing the secret itself. One example for zero-knowledge authentication is when a prover has an asymmetric key-pair (e.g. RSA, EC) and using the private key (the identifying secret) to respond to a challenge sent with the public key. The private key is never revealed, but the verifier is convinced that the prover has the key.