Blockchain, since its inception, promised a revolution: decentralization, transparency, and immutable trust. Yet, beneath the glittering surface of Bitcoin addresses and Ethereum smart contracts lies an uncomfortable tension: visibility versus privacy. Every transaction is recorded on a public ledger. Anyone, anywhere, can peer into these digital histories. For many, this transparency is empowering; for others, it is a glaring threat to privacy. In this tension, zero-knowledge proofs emerge a...