Blockchain-Based Self-Sovereign Identities: Current Landscape and Research Opportunities

Managing identities has become increasingly crucial for various organizations, including banks, government agencies, and healthcare providers. Furthermore, the privacy of personal data has gained increasing importance and concern. In this context, Self-Sovereign Identity (SSI) systems have emerged as a cutting-edge solution that builds on traditional identity management. They empower individuals with unprecedented control over their data, allowing them to selectively share information with authorized entities while retaining their privacy. This paper presents a Systematic Literature Review (SLR) of blockchain-based Self-Sovereign Identities. We analyzed ninety-four articles from eight academic databases and categorized the findings into six major groups, identifying eighteen distinct areas of interest. Our results underscore the growing importance of SSI in digital identity research and its implications for privacy, security, and regulatory compliance. Furthermore, we provide a comprehensive map of the literature, elucidating areas of substantial scholarly attention and those necessitating further exploration.