The development of privacy-preserving smart contracts marks a new era for blockchain applications. Traditional smart contracts on platforms like Ethereum are transparent, meaning their code and execution details are visible to all participants. However, privacy-preserving smart contracts use techniques such as zero-knowledge proofs and secure multi-party computation to hide sensitive information. This allows businesses to deploy smart contracts for confidential processes like supply chain agreements or financial derivatives without compromising proprietary data. The ability to maintain privacy in smart contract operations opens up blockchain technology to a wider range of industries where data confidentiality is essential.