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> Somebody introduces a new technology to address these concerns every couple years and it doesn't go anywhere. These aren't actually problems to a lot of users.

"Use Cases and Requirements for Decentralized Identifiers" https://www.w3.org/TR/did-use-cases/

> 2. Use Cases: Online shopper, Vehicle assemblies, Confidential Customer Engagement, Accessing Master Data of Entities, Transferable Skills Credentials, Cross-platform User-driven Sharing, Pseudonymous Work, Pseudonymity within a supply chain, Digital Permanent Resident Card, Importing retro toys, Public authority identity credentials (eIDAS), Correlation-controlled Services

And then, IIUC W3C Verifiable Credentials / ld-proofs can be signed with W3C DID keys - that can also be generated or registered centrally, like hosted wallets or custody services. There are many Use Cases for Verifiable Credentials: https://www.w3.org/TR/vc-use-cases/ :

> 3. User Needs: Education, Retail, Finance, Healthcare, Professional Credentials, Legal Identity, Devices

> 4. User Tasks: Issue Claim, Assert Claim, Verify Claim, Store / Move Claim, Retrieve Claim, Revoke Claim

> 5. Focal Use Cases: Citizenship by Parentage, Expert Dive Instructor, International Travel with Minor and Upgrade

> 6. User Sequences: How a Verifiable Credential Might Be Created, How a Verifiable Credential Might Be Used

IIRC DHS funded some of the W3C DID and Verified Credentials specification efforts. See also: https://news.ycombinator.com/item?id=26758099

There's probably already a good way to bridge between sub-SKU GS1 schema.org/identifier on barcodes and QR codes and with DIDs. For GS1, you must register a ~namespace prefix and then you can use the rest of the available address space within the barcode or QR code IIUC.

DIDs can replace ORCIDs - which you can also just generate a new one of - for academics seeking to group their ScholarlyArticles by a better identifier than a transient university email address.

The new UUID formats may or may not be optionally useful in conjunction with W3C DID, VC, and Verifiable News, etc. https://news.ycombinator.com/item?id=28088213

When would a DID be a better choice than a UUID?

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