This post is by Phil Windley's Technometria from Phil Windley's Technometria
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Summary: Decentralized identifiers are one of the foundational ideas for supporting self-sovereign identity. This post describes how decentralized identifiers work.
Decentralized identifiers are one of several foundational technologies for building a metasystem for self-sovereign identity. I wrote about verifiable credentials and their exchange previously. Just like the Web required not only URLs, but also a specification for web page formats and how web pages could be formatted, self-sovereign identity needs DIDs, a protocol for creating DID-based relationships, and a specification and protocol for verifiable credential exchange.
Identifiers label things. Computer systems are full of identifiers. Variable names are identifiers. Usernames are identifiers. Filenames are identifiers. IP numbers are identifiers. Domain names are identifiers. Email addresses are identifiers. URLs are identifiers.1 Any time we use a unique (within some context) string to label something for quick reference, we're giving it an identifier. A computer system uses identifiers to correlate all