August 2024

Integrity is also doing the right thing when everyone is watching

C.S Lewis

Executive Summary

Solo Wallet, the SoloSafe project mobile wallet, represents a breakthrough in financial technology, leveraging zero-knowledge (zk) technology to facilitate secure and seamless offline transactions in regions plagued by inconsistent Internet and cellular network coverage. Designed to support both urban and rural environments, Solo Wallet addresses the urgent need for reliable financial transactions without dependence on traditional network infrastructures.

Introduction

In today’s interconnected world, a significant portion of the global population still faces substantial barriers to online financial accessibility. Urban areas in developing nations frequently encounter unstable Internet connections, leading to reliance on outdated technologies like USSD, which offers poor user experiences. Meanwhile, rural regions such as the Democratic Republic of Congo have areas with no cellular coverage at all, necessitating the use of cash and physical money transfer methods that compromise security and efficiency.

The Challenge

Current mobile money solutions like M-Pesa and Airtel Money, although revolutionary, still rely on some form of network availability and fail to provide a consistent and seamless user experience. The absence of network coverage not only hinders basic transactions but also affects the economic stability of individuals and communities.

Solution Overview: Solo Wallet

Solo Wallet introduces an innovative solution to these challenges by utilizing zero-knowledge technology to enable offline payments. The wallet ensures transaction integrity, defined as the capability to process transactions correctly and securely, irrespective of external monitoring.

Key Features

• Offline Transaction Capability: Utilizes Bluetooth, hotspot, or QR technology to facilitate transactions without an Internet or cellular connection.
• Zero Risk of Double Spending: Ensures that each transaction is secure and unique, even in offline mode.
• Simple User Interface: Provides an easy-to-use platform that allows users to manage digital cash for offline use.
• Synchronization and Verification: Features a robust synchronizing and verification mechanism using Zero-Knowledge Virtual Machine (ZKVM) networks like Starknet to validate transactions once connectivity is restored.

Use Cases

Beyond the Internet barrier limit thanks to ZKP

• Daily Expenses: Simplifies everyday transactions in urban areas with unstable Internet, such as metros or elevators, as well as in remote rural areas.