SoK: A Taxonomy for Distributed-Ledger-Based Identity Management

The intersection of blockchain (distributed ledger) and identity management lacks a comprehensive framework for classifying distributed-ledger-based identity solutions. This paper introduces a methodologically developed taxonomy derived from the analysis of 390 scientific papers and expert discussions.The resulting framework consists of 22 dimensions with 113 characteristics, organized into three groups: trust anchor implementations, identity architectures (identifiers and credentials), and ledger specifications. This taxonomy facilitates the systematic analysis, comparison, and design of distributed-ledger-based identity solutions, as demonstrated through its application to two distinct architectures.As the first methodology-driven taxonomy in this field, this work advances standardization and enhances understanding of distributed-ledger-based identity architectures. It provides researchers and practitioners with a structured framework for evaluating design decisions and implementation approaches.

@article{vaziry2025_2505.05100,
  title={ SoK: A Taxonomy for Distributed-Ledger-Based Identity Management },
  author={ Awid Vaziry and Sandro Rodriguez Garzon and Patrick Herbke and Carlo Segat and Axel Kupper },
  journal={arXiv preprint arXiv:2505.05100},
  year={ 2025 }
}