Zero-knowledge proof involves two parties, a verifier and a prover. The prover can prove to the verifier that they have a certain piece of information without revealing what it actually is.

In order to use zero-knowledge proof for the given problem, the prover (you) and the verifier (your friend) would need to agree on a certain parameter, such as net worth. Then, the prover would generate a cryptographic proof (also known as a "nonce") that is cryptographically linked to their net worth. This nonce can be validated by the verifier without being aware of the actual amount of money owned by the prover.

If the nonce is valid, then it proves that your net worth is greater than your friends without revealing any of your actual account balances.

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