Re: did:key questions (was: DHS SVIP Blockchain/DLT/SSI Cohort - Multi-Product Phase 1 Interop Artifacts/ Scaffolding / Information)

On Fri, 12 Jun 2020 at 17:06, Melvin Carvalho <melvincarvalho@gmail.com>
wrote:

>
>
> On Fri, 12 Jun 2020 at 15:10, Manu Sporny <msporny@digitalbazaar.com>
> wrote:
>
>> On 6/12/20 8:28 AM, Dan Bolser wrote:
>> > Just reading this:
>> > https://w3c-ccg.github.io/did-method-key/
>> >
>> > Which looks nice, but I don't understand how resolution from DID to DID
>> > doc happens.
>> >
>> >     The creation of a DID Document is also performed by taking the
>> >     public key value and expanding it into DID Document
>>
>> Hi Dan, I'm one of the Editors for that specification. I'm going to
>> attempt to answer your questions below:
>>
>> > Ah... is the DID doc just a version of the key in a different format?
>>
>> Yes, more or less. The DID Document is deterministically generated from
>> the DID. The goal of did:key is to be THE simplest and easiest to
>> implement DID Method.
>>
>> > e.g. no other fields except those directly derived from the key are
>> allowed?
>>
>> Yes.
>>
>> > Sorry if that's obvious (sorry if this is a dumb question).
>>
>> No dumb questions... and this is a very good question and gets to the
>> heart of what did:key is about.
>>
>
> Hopefully this is neither a dumb question:
>
> Could a did:key Document be embedded in a regular JSON-LD document or
> "Data Island"
>
> For example could I say "Alice has a did:key:multihash document"
>
> What would be a way to link Alice and the did:key, if there is one?
>
> In Turtle:
>
> <#Alice> *???* <did:key:multihash> .
>
> In JSON-LD
>
> {
>   "@id": "#Alice",
>   "*???*":  [{ "@id" : "did:key:multihash" }]
> >
>
> What is the part labeled with 3 question marks?
>

Hmmm, this also made me think:

https://w3c-ccg.github.io/did-method-key/#example-2-a-did-document-derived-from-a-did-key

Perhaps the DID Document should have a type?  Something like

"type": "DIDDocument"

In Example 8, above.  Or is that assumed from the @context?


>
>>
>> > In this sense it's essentially a 'mock' or 'placeholder' DID document?
>>
>> I wouldn't say it's a 'mock' or 'placeholder' DID document. It is a
>> bonafide DID Document that can be used in production systems that don't
>> require key rotation. For example, very useful in test environments and
>> systems that use short lived DIDs (throw-away pairwise relationships,
>> etc.).
>>
>> -- manu
>>
>> --
>> Manu Sporny - https://www.linkedin.com/in/manusporny/
>> Founder/CEO - Digital Bazaar, Inc.
>> blog: Veres One Decentralized Identifier Blockchain Launches
>> https://tinyurl.com/veres-one-launches
>>
>>