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Verify ownership
Little A wants to verify whether Little B knows the safe password, but Little B does not want Little A to see the safe password:
Little A stands in the distance;
Under the cover, Little B entered the password and opened the safe;
Little B took out one of the things in the safe;
If Little A thinks that the thing is only in the safe, then Little A can think that Little B does have the password for the safe.
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Corporate Credit
Scenario: Bank A needs to verify whether Bank A’s salary is greater than RMB 2,000 before lending to Small B, but Small B does not want Bank A to know what his salary is.
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Three, classification
Interactive zero-knowledge proof: The verifier and the prover need to interact, as in 1 in the example.
Non-interactive zero-knowledge proof: No interaction between the verifier and the prover is required, as in example 2.