Internet commerce currently depends overwhelmingly on financial institutions acting as trusted intermediaries for electronic payments. While this system functions adequately for most transactions, it inherits the vulnerabilities of trust-based models. Truly irreversible transactions are impossible because institutions must mediate disputes, raising costs and excluding small, casual payments. Furthermore, the potential for payment reversibility forces merchants to demand excessive customer information, accepting a baseline level of fraud as inevitable. Physical cash avoids these issues for in-person transactions, but no equivalent exists for digital payments without a trusted third party.

A better solution is an **electronic payment system** built on **cryptographic proof** rather than trust, enabling direct transactions between parties. Irreversible transactions would protect sellers from fraud, while escrow mechanisms could safeguard buyers. This paper addresses the double-spending problem by introducing a **peer-to-peer timestamp server** that orders transactions through computational proof. The system remains secure as long as honest nodes collectively dominate the network’s computing power, preventing attackers from rewriting history.