The Transparency Challenge in Blockchain-Enabled Sustainable Development Goals Applications: Exploring Privacy-Preserving Techniques and Emerging Platforms

Abstract

Blockchain technology has emerged as prominent player in supporting the United Nations’ Sustainable Development Goals (SDGs), by providing transparent, decentralized solutions across various sectors. However, the inherent transparency of blockchain raises significant privacy concerns, particularly in sensitive fields such as healthcare, finance, and supply chains, where confidentiality is essential. To address these challenges, we delve into emerging privacy-preserving techniques such as Ring Signatures, Zero-Knowledge Proofs (ZKPs), Secure Multi-Party Computation (SMPC), Trusted Execution Environments (TEEs), and mixers, examining their implementation, effectiveness and limitations in safeguarding user data without compromising blockchain’s core features. Additionally, we provide a deep technical analysis of next-generation blockchain platforms, which implement these techniques to balance privacy, scalability, and interoperability. By offering a deep dive into the architectures and privacy mechanisms of these platforms, this paper contributes to understanding how blockchain can be leveraged to achieve SDG objectives while addressing the critical issue of data privacy.