"Self-sovereign identity (SSI) is an approach to digital identity that gives individuals control of their digital identities. SSI addresses the difficulty of establishing trust in an interaction. In order to be trusted, one party in an interaction will present credentials to the other parties, and those relying parties can verify that the credentials came from an issuer that they trust. In this way, the verifier's trust in the issuer is transferred to the credential holder. This basic structure of SSI with three participants is sometimes called "the trust triangle".
The EU is creating an eIDAS compatible European Self-Sovereign Identity Framework (ESSIF). The ESSIF makes use of [[Decentralized Identifiers]] (DIDs) and the European Blockchain Services Infrastructure (EBSI). ref: https://ssimeetup.org/understanding-european-self-sovereign-identity-framework-essif-daniel-du-seuil-carlos-pastor-webinar-32/
Related to this is the idea of [[verifiable credentials]]