Application of Digital Signatures in the Field of E-commerce

As a critical mechanism to ensure e-commerce information security, digital signatures have been widely used in core scenarios such as identity authentication, data integrity verification, and non-repudiation assurance. This paper systematically reviews the technical principles of digital signatures and their practical applications in the field of e-commerce. It further investigates application processes and security characteristics of digital signatures for different application scenarios in centralized and decentralized trust models, such as business-to-customer (B2C) transactions, business-to-business (B2B) transactions, and Bitcoin peer-to-peer (P2P) transactions. At the same time, signature schemes based on classical algorithms such as Rivest-Shamir-Adleman (RSA) and Elliptic Curve Cryptography (ECC), as well as cutting-edge signature technologies based on post-quantum cryptography, are discussed. Finally, combined with future technology trends, this paper looks forward to the innovative directions of digital signatures in lightweight design, privacy protection, and quantization, providing theoretical support and practical reference for the development of digital signatures in the field of e-commerce.