  Self-Sovereign Identity (SSI) is a novel and emerging, decentralized digital
identity approach that enables entities to control and manage their digital
identifiers and associated identity data fully while enhancing trust, privacy,
security, and the many other properties identified and analyzed in this paper.
The paper provides an overview and classification of the SSI properties,
focusing on an in-depth analysis, furthermore, presenting a comprehensive
collection of SSI properties that are important for the implementation of the
SSI system. In addition, it explores the general SSI process flow, and
highlights the steps in which individual properties are important. After the
initial purification and classification phase, we then validated properties
among experts in the field of Decentralized and Self-Sovereign Identity
Management using an online questionnaire, which resulted in a final set of
classified and verified SSI properties. The results can be used for further
work on definition and standardization of the SSI field.
