The W3C has announced a verifiable credentials standard. "The Verifiable Claims Working Group has published Verifiable Credentials Data Model 1.0 as a W3C Recommendation. Credentials are a part of our daily lives; driver's licenses are used to assert that we are capable of operating a motor vehicle, university degrees can be used to assert our level of education, and government-issued passports enable us to travel between countries. This specification provides a mechanism to express these sorts of credentials on the Web in a way that is cryptographically secure, privacy respecting, and machine-verifiable." Do take a look at the very least to the table of contents. There's quite a bit of depth here, and a recognition that the idea of credentials overlaps into areas of privacy, security and trust. For those who dig deeper, there's some really cool stuff in here, eg., the section on zero-knowledge proofs.
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