Re: Regarding Changing ownership

Suppose Party A is the controller of Thing X, identified by X.did.

Inside of X.diddoc is A.pubkey.

Now A sells X to B.

B gives A B.pubkey.

A writes an update to X.diddoc that replaces A.pubkey with B.pubkey, and
signs the update with A.pubkey.

Now X.diddoc contains B.pubkey. No private key has been shared, but control
has been transferred.

On Thu, Sep 19, 2019 at 12:11 PM sethi shivam <sethishivam27@gmail.com>
wrote:

> Thanks Michael,
> For the explanation.
> I am still struggling with the transfers of keys in case of changing the
> controller
>
> What are the ways to do that.
>
> Because we can't share the private key with others.
>
>
> On Thu, 19 Sep, 2019, 11:19 PM Michael Herman (Parallelspace), <
> mwherman@parallelspace.net> wrote:
>
>> A DID can be assigned to any non-fungible entity (aka a unique,
>> non-interchangeable thing).   For example, the Sovrin Governance Framework
>> supports this through the Controller concept; more specifically,  a Thing
>> Controller.
>>
>>
>>
>> *Controller An Identity Owner that is responsible for control of another
>> Entity—specifically the Private Keys needed to take actions on behalf of
>> that Entity. For example, a Thing Controller has a Controller relationship
>> with a Thing. It is one of three types of identity control relationships
>> described in Appendix C.*
>>
>>
>>
>> Best regards,
>>
>> Michael Herman
>>
>> Self-Sovereign Blockchain Architect
>>
>> Hyperonomy Digital Identity Lab
>>
>> Parallelspace Corporation
>>
>>
>>
>> *From:* williamc@itr8.com <williamc@itr8.com> *On Behalf Of *Bill
>> Claxton, Founder & Operations Director of NextID
>> *Sent:* September 19, 2019 5:29 AM
>> *To:* sethishivam27@gmail.com
>> *Cc:* public-credentials@w3.org
>> *Subject:* Re: Regarding Changing ownership
>>
>>
>>
>> Sethi,
>>
>> Technically I suppose a DID may be assigned to a laptop, but you made me
>> go back and read the spec.  "In a decentralized identity system,
>> entities (in the sense of discrete identifiable units such as — but not
>> limited to — people, organizations, and things) are free to use any shared
>> root of trust."  To me it seems weird that a laptop can be a DID subject,
>> as it is not free to do anything much less share a root of trust.
>>
>> I don't believe DIDs are intended to capture ownership information.
>>
>> Regards, Bill Claxton (williamc@nextid.com)
>> LinkedIn, Facebook, Telegram, Slack, Skype, Twitter or Gmail: wmclaxton
>> SG Voice, Text or Whatsapp: +65-9012-4327
>> US Voice, Text or Voicemail: +1-415-797-7348
>>
>>
>>
>> On 9/19/2019 6:45 PM, sethi shivam wrote:
>>
>> I have a query. Suppose I have a laptop with DID "did:laptp:12345"  and I
>> sold it to someone. Now ownership changed to my friend.
>>
>>
>>
>