Consider a case of a credit card user who has to prove to a credit institution that he has held a sufficient average balance in his bank account for the past three months. The standard way of doing this is for the borrower during the time to exchange the bank statements. It, though, exposes much more sensitive knowledge than the organization wants. Not only does it show the exact balance, but also the specifics of the trade. Ideally, without disclosing the transaction information, the borrower would like to persuade the credit provider that the private data meets the balance condition. Let’s take a look at how blockchain app development with Zero-Knowledge Proof implementation addresses privacy challenges.