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eCash Protocol Wiki

Welcome to the eCash Protocol documentation. This wiki provides comprehensive guides for developers, operators, and researchers.

Quick Links

• Getting Started - Installation and first steps
• API Reference - Complete endpoint documentation
• Deployment Guide - Production deployment
• Protocol Specification - Technical details
• Security Model - Cryptographic guarantees
• Troubleshooting - Common issues and solutions

Overview

eCash Protocol is a production-grade implementation of David Chaum's blind signature protocol for anonymous digital cash. The system provides cryptographic unlinkability between withdrawal and spending while preventing double-spending through atomic database operations.

Key Components:

• ecash-core - Cryptographic library (RSA-3072 blind signatures)
• ecash-server - REST API backend (Axum + PostgreSQL + Redis)
• ecash-client - SDK for wallet integration

Architecture

Client → Nginx → API Server → PostgreSQL (audit)
                           └→ Redis (cache)

Resources

• GitHub Repository
• Academic Whitepaper
• Original Paper - Chaum (1983)