Self-sovereign identity (1) has the concept of a Decentralized identifier (2) at its core and, as far as I understand it, most use cases rely on the DIDs being

Self-sovereign identity (1) has the concept of a Decentralized identifier (2) at its core and, as far as I understand it, most use cases rely on the DIDs being stored on a distributed ledger, which is generally Blockchain. Disclaimer: not a crypto or blockchain promoter but the above is my understanding of SSI. (1) https://en.m.wikipedia.org/wiki/Self-sovereign_identity https://en.m.wikipedia.org/wiki/Self-sovereign_identity (2) https://www.w3.org/TR/did-core/ https://www.w3.org/TR/did-core/