Baruni, Kedimotse PNtshangase, Cynthia SNgobeni, Harvest TMoatshe, Lesego SNdhlovu, Nomalisa2026-01-052026-01-052025http://hdl.handle.net/10204/14554This paper presents a qualitative review of the integration of Zero Knowledge Proofs (ZKPs) and biometrics in Decentralized Identity (DID) sys tems. It explores how these technologies address key challenges in digital identity management, including privacy preservation, security enhancement, and regula tory compliance. Using three research questions, the study systematically reviews the recent literature to identify the problems these technologies solve, the sectors where they are applied, and the standards that govern their implementation. The review further reveals that ZKPs-DID is the most widely adopted method, dom inating finance and governance applications, while Bio-DID focuses on healthcare and education under GDPR, and BioZK-DID combines biometrics with ZKPs for enhanced security but with limited regulatory guidance. The find ings reveal that ZKPs enable privacy-preserving verification, while biometrics offer robust user-specific authentication. Integration within DID systems is par ticularly relevant in sectors such as finance, healthcare, governance, and educa tion. However, challenges remain in scalability, interoperability, and regulatory alignment. This paper contributes new insights by proposing technical guidelines, policy recommendations, and future research directions to support the ethical and effective deployment of ZKP-biometric-enabled DID systems.FulltextenZero-Knowledge-ProofsZKPsBiometricsDecentralized Identity Sys temsPrivacyInformation securityRegulationsStandardsConference PresentationN/A