Re: [EXTERNAL] [jfraichot@learningmachine.com] Re: DID or CID

I am not involved in the discussions nor the spec writing, but as practical use case I can see the Controller Document being a VC for instance and not a DID, while respecting the semantics of the latter to facilitate reading the expected data, DIDs being a subset of CIDs.

From: Nis Jespersen <nis.jespersen@gmail.com>
Date: Thursday, 30 January 2025 at 11:10
To: Steve Capell <steve.capell@gmail.com>
Cc: W3C Credentials CG <public-credentials@w3.org>
Subject: [EXTERNAL] [jfraichot@learningmachine.com] Re: DID or CID
Hi Steve et al. , I believe this is what used to be the Controller Document draft spec. My high level take is that CIDs filter the best parts of the DID spec, leaving behind some of the baggage - notably the need for new resolvers and DID-method

Hi Steve et al.,

I believe this is what used to be the Controller Document draft spec. My high level take is that CIDs filter the best parts of the DID spec, leaving behind some of the baggage - notably the need for new resolvers and DID-method incompatibility.

DIDs account for generic registration (notably blockchain networks); but if the world ends up using did:web, we don't gain anything from paying the price for this DID abstraction. Instead of describing the resolver in the abstract, the CID spec just describes where and how to place the necessary cryptographic elements, resolving with classic HTTP.

FWIW I did a quick piece on this a while back when I first heard of it: https://medium.com/transmute-techtalk/revolutionary-identity-tech-evolved-616156f8fe59 [medium.com]<https://urldefense.com/v3/__https:/medium.com/transmute-techtalk/revolutionary-identity-tech-evolved-616156f8fe59__;!!C8mu0vCj!cHAUTPK-WWIcK0htJAPobE_IlzK6Zs7P2rjOgOEXTZNAX6c4Txx2qr0TMuLMeFhl7UyowJY2MyYU_tvCaquC5lYSLa_q8A$>

Nis


On Thu, Jan 30, 2025 at 10:43 AM Steve Capell <steve.capell@gmail.com<mailto:steve.capell@gmail.com>> wrote:
Just saw an announcement from w3c about a new candidate recommendation about “Controlled Identifiers” (CID) - https://www.w3.org/TR/2025/CR-cid-1.0-20250130/ [w3.org]<https://urldefense.com/v3/__https:/www.w3.org/TR/2025/CR-cid-1.0-20250130/__;!!C8mu0vCj!cHAUTPK-WWIcK0htJAPobE_IlzK6Zs7P2rjOgOEXTZNAX6c4Txx2qr0TMuLMeFhl7UyowJY2MyYU_tvCaquC5lb9zoqXFQ$>

It looks an awful lot like a DID - https://www.w3.org/TR/did-1.0/ [w3.org]<https://urldefense.com/v3/__https:/www.w3.org/TR/did-1.0/__;!!C8mu0vCj!cHAUTPK-WWIcK0htJAPobE_IlzK6Zs7P2rjOgOEXTZNAX6c4Txx2qr0TMuLMeFhl7UyowJY2MyYU_tvCaquC5laBt5YS_g$>

It doest really say how a CID differed from a DID or why we need a new specification

Cab anyone shed light?

Steven Capell
Mob: 0410 437854

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