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Decentralized Identifiers
A W3C Working Group Proposal
1
SSIMeetup.org15 Oct. 2018
Drummond Reed
Evernym Chief Trust Officer and
Sovrin Foundation Trustee
@drummondreed
https://creativecommons.org/licenses/by-sa/4.0/
Manu Sporny
Founder/CEO - Digital Bazaar
@manusporny
1. Empower global SSI communities
2. Open to everyone interested in SSI
3. All content is shared with CC BY SA
SSIMeetup.org
Alex Preukschat @SSIMeetup @AlexPreukschat
Coordinating Node SSIMeetup.org
https://creativecommons.org/licenses/by-sa/4.0/
SSIMeetup objectives
07 May 2018
Let’s start at the beginning.
Where did DIDs come from?
SSIMeetup.org
https://creativecommons.org/licenses/by-
sa/4.0/
SSIMeetup.org
https://creativecommons.org/licenses/by-
sa/4.0/
So what exactly is a DID?
SSIMeetup.org
https://creativecommons.org/licenses/by-
sa/4.0/
What is a Decentralized Identifier?
A new type of URL that is:
● globally unique,
● highly available, and
● cryptographically verifiable.
8
SSIMeetup.org
https://creativecommons.org/li
censes/by-sa/4.0/
What does a DID look like?
SSIMeetup.org
https://creativecommons.org/licenses/by-
sa/4.0/
What does a DID look like?
10
did:example:123456789abcdefghijk
Scheme
DID Method
DID Method Specific String
did:v1:nym:BcNkgGmGEpCGSJSMPB4BvWvwVM6YeTR52BSWcZTbzU23
Example:
SSIMeetup.org
https://creativecommons.org/licenses/b
y-sa/4.0/
What does a DID point to?
SSIMeetup.org
https://creativecommons.org/licenses/by-
sa/4.0/
DIDs Resolve to DID Documents
12
{
"@context": "https://w3id.org/veres-one/v1",
"id": "did:v1:nym:DwkYwcoyUXHNkpj3whn4DgXB4fcg9gj95vKxYN2apkZD",
"authentication": [{
"type": "Ed25519SignatureAuthentication2018",
"publicKey": [{
"id": "did:v1:test:nym:DwkYwcoyUXHNkpj3whn4DgXB4fcg9gj95vKxYN2apkZD#authn-key-1",
"type": "Ed25519VerificationKey2018",
"controller": "did:v1:nym:DwkYwcoyUXHNkpj3whn4DgXB4fcg9gj95vKxYN2apkZD",
"publicKeyBase58": "DwkYwcoyUXHNkpj3whn4DgXB4fcg9gj95vKxYN2apkZD"
}]
}],
"service": [{
"type": "ExampleMessagingService2018",
"serviceEndpoint": ”https://example.com/services/messages”
}],
… more DID-specific information here …
}
1. Authentication Mechanisms
3. Service Discovery
2. Public Key Material
SSIMeetup.org
https://creativecommons.org/licenses/b
y-sa/4.0/
Is blockchain technology
necessary for DIDs?
Microsoft Decentralized Identity white paper—https://query.prod.cms.rt.microsoft.com/cms/api/am/binary/RE2DjfY
What role do DIDs play in
verifiable credentials?
SSIMeetup.org
https://creativecommons.org/licenses/by-
sa/4.0/
We use DIDs in Verifiable Credentials
16
21did:x:123
did:x:789Professor
knows
Pat
Sam
name ageOver
namejobTitle
SSIMeetup.org
https://creativecommons.org/licenses/b
y-sa/4.0/
Why is this better than the URLs or
other addresses we use today?
SSIMeetup.org
https://creativecommons.org/licenses/by-
sa/4.0/
Web Identifiers Today
18
Domain Name System
(Identifiers are leased to individuals)
Issuer
(Website)
Government, Employer, etc.
Verifier
(Website)
Company, Bank, etc.
Holder
(Digital Wallet /
Personal Data Store)
Citizen, Employee, etc.
Issue
Credentials
Present
Credentials
SSIMeetup.org
https://creativecommons.org/licenses/b
y-sa/4.0/
Decentralized Identifiers
19
Decentralized Identifiers
(Identifiers are owned by individuals)
Blockchains / DHTs
(Decentralized Ledger)
Veres One, Sovrin, Bitcoin, Ethereum, etc.
Issuer
(Website)
Government, Employer, etc.
Verifier
(Website)
Company, Bank, etc.
Holder
(Digital Wallet /
Personal Data Store)
Citizen, Employee, etc.
Issue
Credentials
Present
Credentials
SSIMeetup.org
https://creativecommons.org/licenses/b
y-sa/4.0/
Where is the DID spec now?
SSIMeetup.org
https://creativecommons.org/licenses/by-
sa/4.0/
How do the different groups work at
W3C? When do you create a
Community Group? A Working Group?
SSIMeetup.org
https://creativecommons.org/licenses/by-
sa/4.0/
23
W3C Credentials Community Group
Rebooting the Web of Trust
Why is there interest in creating a
DID Working Group now?
SSIMeetup.org
https://creativecommons.org/licenses/by-
sa/4.0/
W3C DID WG Proposal - Survey Results
26
SSIMeetup.org
https://creativecommons.org/li
censes/by-sa/4.0/
27
SSIMeetup.org
https://creativecommons.org/li
censes/by-sa/4.0/
28
SSIMeetup.org
https://creativecommons.org/li
censes/by-sa/4.0/
29
SSIMeetup.org
https://creativecommons.org/li
censes/by-sa/4.0/
30
SSIMeetup.org
https://creativecommons.org/li
censes/by-sa/4.0/
What is the process to create a new
W3C Working Group?
SSIMeetup.org
https://creativecommons.org/licenses/by-
sa/4.0/
Next Steps
32
W3C TPAC
(Oct 2018)
DID WG Charter Vote
(Jan 2019)
W3C DID WG
(Feb 2019)
W3C Strong Auth and Identity Workshop
(Dec 10th-11th, 2018 - Redmond, WA)
SSIMeetup.org
https://creativecommons.org/licenses/b
y-sa/4.0/
What is W3C TPAC?
SSIMeetup.org
https://creativecommons.org/licenses/by-
sa/4.0/
What else is going on that same week?
SSIMeetup.org
https://creativecommons.org/licenses/by-
sa/4.0/
36
The Internet Identity Workshop
October 23-25, Mountain View, CA, USA
If developers, architects, etc. are
interesting in getting involved with this
work, what should they do?
SSIMeetup.org
https://creativecommons.org/licenses/by-
sa/4.0/
Questions?
https://tinyurl.com/did-wg-proposal
38
SSIMeetup.org
https://creativecommons.org/li
censes/by-sa/4.0/
Contact
Manu Sporny
msporny@digitalbazaar.com
Drummond Reed
drummond.reed@evernym.com
W3C Credentials CG
https://w3c-ccg.github.io/
39

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Decentralized Identifiers DIDs and W3C with Manu Sporny and Drummond Reed

  • 1. Decentralized Identifiers A W3C Working Group Proposal 1 SSIMeetup.org15 Oct. 2018 Drummond Reed Evernym Chief Trust Officer and Sovrin Foundation Trustee @drummondreed https://creativecommons.org/licenses/by-sa/4.0/ Manu Sporny Founder/CEO - Digital Bazaar @manusporny
  • 2. 1. Empower global SSI communities 2. Open to everyone interested in SSI 3. All content is shared with CC BY SA SSIMeetup.org Alex Preukschat @SSIMeetup @AlexPreukschat Coordinating Node SSIMeetup.org https://creativecommons.org/licenses/by-sa/4.0/ SSIMeetup objectives 07 May 2018
  • 3. Let’s start at the beginning. Where did DIDs come from? SSIMeetup.org https://creativecommons.org/licenses/by- sa/4.0/
  • 5.
  • 6.
  • 7. So what exactly is a DID? SSIMeetup.org https://creativecommons.org/licenses/by- sa/4.0/
  • 8. What is a Decentralized Identifier? A new type of URL that is: ● globally unique, ● highly available, and ● cryptographically verifiable. 8 SSIMeetup.org https://creativecommons.org/li censes/by-sa/4.0/
  • 9. What does a DID look like? SSIMeetup.org https://creativecommons.org/licenses/by- sa/4.0/
  • 10. What does a DID look like? 10 did:example:123456789abcdefghijk Scheme DID Method DID Method Specific String did:v1:nym:BcNkgGmGEpCGSJSMPB4BvWvwVM6YeTR52BSWcZTbzU23 Example: SSIMeetup.org https://creativecommons.org/licenses/b y-sa/4.0/
  • 11. What does a DID point to? SSIMeetup.org https://creativecommons.org/licenses/by- sa/4.0/
  • 12. DIDs Resolve to DID Documents 12 { "@context": "https://w3id.org/veres-one/v1", "id": "did:v1:nym:DwkYwcoyUXHNkpj3whn4DgXB4fcg9gj95vKxYN2apkZD", "authentication": [{ "type": "Ed25519SignatureAuthentication2018", "publicKey": [{ "id": "did:v1:test:nym:DwkYwcoyUXHNkpj3whn4DgXB4fcg9gj95vKxYN2apkZD#authn-key-1", "type": "Ed25519VerificationKey2018", "controller": "did:v1:nym:DwkYwcoyUXHNkpj3whn4DgXB4fcg9gj95vKxYN2apkZD", "publicKeyBase58": "DwkYwcoyUXHNkpj3whn4DgXB4fcg9gj95vKxYN2apkZD" }] }], "service": [{ "type": "ExampleMessagingService2018", "serviceEndpoint": ”https://example.com/services/messages” }], … more DID-specific information here … } 1. Authentication Mechanisms 3. Service Discovery 2. Public Key Material SSIMeetup.org https://creativecommons.org/licenses/b y-sa/4.0/
  • 14. Microsoft Decentralized Identity white paper—https://query.prod.cms.rt.microsoft.com/cms/api/am/binary/RE2DjfY
  • 15. What role do DIDs play in verifiable credentials? SSIMeetup.org https://creativecommons.org/licenses/by- sa/4.0/
  • 16. We use DIDs in Verifiable Credentials 16 21did:x:123 did:x:789Professor knows Pat Sam name ageOver namejobTitle SSIMeetup.org https://creativecommons.org/licenses/b y-sa/4.0/
  • 17. Why is this better than the URLs or other addresses we use today? SSIMeetup.org https://creativecommons.org/licenses/by- sa/4.0/
  • 18. Web Identifiers Today 18 Domain Name System (Identifiers are leased to individuals) Issuer (Website) Government, Employer, etc. Verifier (Website) Company, Bank, etc. Holder (Digital Wallet / Personal Data Store) Citizen, Employee, etc. Issue Credentials Present Credentials SSIMeetup.org https://creativecommons.org/licenses/b y-sa/4.0/
  • 19. Decentralized Identifiers 19 Decentralized Identifiers (Identifiers are owned by individuals) Blockchains / DHTs (Decentralized Ledger) Veres One, Sovrin, Bitcoin, Ethereum, etc. Issuer (Website) Government, Employer, etc. Verifier (Website) Company, Bank, etc. Holder (Digital Wallet / Personal Data Store) Citizen, Employee, etc. Issue Credentials Present Credentials SSIMeetup.org https://creativecommons.org/licenses/b y-sa/4.0/
  • 20. Where is the DID spec now? SSIMeetup.org https://creativecommons.org/licenses/by- sa/4.0/
  • 21.
  • 22. How do the different groups work at W3C? When do you create a Community Group? A Working Group? SSIMeetup.org https://creativecommons.org/licenses/by- sa/4.0/
  • 23. 23 W3C Credentials Community Group Rebooting the Web of Trust
  • 24.
  • 25. Why is there interest in creating a DID Working Group now? SSIMeetup.org https://creativecommons.org/licenses/by- sa/4.0/
  • 26. W3C DID WG Proposal - Survey Results 26 SSIMeetup.org https://creativecommons.org/li censes/by-sa/4.0/
  • 31. What is the process to create a new W3C Working Group? SSIMeetup.org https://creativecommons.org/licenses/by- sa/4.0/
  • 32. Next Steps 32 W3C TPAC (Oct 2018) DID WG Charter Vote (Jan 2019) W3C DID WG (Feb 2019) W3C Strong Auth and Identity Workshop (Dec 10th-11th, 2018 - Redmond, WA) SSIMeetup.org https://creativecommons.org/licenses/b y-sa/4.0/
  • 33. What is W3C TPAC? SSIMeetup.org https://creativecommons.org/licenses/by- sa/4.0/
  • 34.
  • 35. What else is going on that same week? SSIMeetup.org https://creativecommons.org/licenses/by- sa/4.0/
  • 36. 36 The Internet Identity Workshop October 23-25, Mountain View, CA, USA
  • 37. If developers, architects, etc. are interesting in getting involved with this work, what should they do? SSIMeetup.org https://creativecommons.org/licenses/by- sa/4.0/