Basic 2G feature phones can now use advanced zero-knowledge cryptography to provide bank-grade identity verification via simple SMS.
Financial inclusion in Sub-Saharan Africa is often blocked because people lack formal government IDs or expensive smartphones. This framework allows a user to prove their identity to a bank without ever revealing their personal details or location. It uses Zero-Knowledge Proofs to verify credentials on a central server while communicating through the most basic cellular networks. This brings the privacy levels of elite blockchain systems to people who have never even used an app. Before this, these populations had to choose between no banking or total surveillance. This system proves that high-end privacy technology can be scaled for the world's most underserved users.
ZKP-IDFS: A Zero-Knowledge Proof-Based Digital Identity Framework for Financial Inclusion in Sub-Saharan Africa
SSRN · 6629418
Financial exclusion remains one of the most persistent development challenges in Sub-Saharan Africa. According to the World Bank Global Findex Database, account ownership in the region rose from 34% of adults in 2014 to 58% by 2024, yet an estimated 42% of adults still lack access to any formal financial account. A primary structural barrier is the absence of verifiable identity documentation: in many countries, over 40% of unbanked adults cite lack of documentation as a key reason they cannot o