Privacy-Preserving Cryptographic Solutions for Cryptocurrency Transactions: Enhancing Anonymity and Security

Abstract

As cryptocurrencies gain global traction, concerns over user privacy and transaction traceability have intensified. Public blockchains like Bitcoin and Ethereum inherently expose transactional data, compromising user anonymity. In response, various privacy-preserving cryptographic techniques have been developed to conceal user identities, transaction amounts, and flow paths without sacrificing security or decentralization. This paper explores key cryptographic solutions including ring signatures, zero-knowledge proofs (ZKPs), stealth addresses, and homomorphic encryption as applied in privacy-focused cryptocurrencies such as Monero and Zcash. The study evaluates the effectiveness, scalability, and regulatory implications of these protocols, providing insights into the future of anonymous digital finance.