Blockchain transaction data privacy protection scheme

Blockchain is a shared digital ledger that, once transactions are recorded and verified, cannot be altered. Since most blockchain nodes maintain a copy of the ledger, blockchain brings the benefit of decentralization but also introduces privacy concerns. This paper explores the privacy issues associated with blockchain transaction data, primarily using zero-knowledge proof technology to design a privacy protection scheme. This scheme utilizes Pedersen commitments and Bulletproofs zero-knowledge proof technology to prevent the disclosure of transaction information while ensuring the correctness and legality of transaction data. Security analysis of the scheme demonstrates that it effectively addresses problems such as double-spending, payment authorization, and dishonest miners, thereby enhancing blockchain performance while protecting the privacy of blockchain transaction data.