Buy your coffee with bitcoin: Real-world deployment of a bitcoin point of sale terminal

TL;DR

This paper presents the design, implementation, and real-world deployment of an open-source Bitcoin Point of Sale system called Aunja PoS, tailored for small businesses handling small-value transactions.

Contribution

It introduces a new evaluation framework for Bitcoin payment systems and provides a practical PoS solution that meets security, usability, and deployability criteria.

Findings

Aunja PoS has been successfully deployed in a cafe since October 2014.

The system meets the defined security and usability requirements.

Open source availability facilitates adoption and further development.

Abstract

In this paper we discuss existing approaches for Bitcoin payments, as suitable for a small business for small-value transactions. We develop an evaluation framework utilizing security, usability, deployability criteria,, examine several existing systems, tools. Following a requirements engineering approach, we designed, implemented a new Point of Sale (PoS) system that satisfies an optimal set of criteria within our evaluation framework. Our open source system, Aunja PoS, has been deployed in a real world cafe since October 2014.