Overview of Decentralized Identity

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Hello there!

Meeting Agenda
● Decentralized Identity
– Jim Flynn
● Q&A
– Gavin Andresen

Not in this talk
Everything
about digital
identity

Overview
● Past and current approaches
● Decentralized identifiers (DIDs)
● Selected projects
● The Poker Protocol

1st
Generation Digital ID
ID data
“siloed”

2nd
Generation Digital ID
ID data
“federated”
Identity Provider (IdP)

Centralized ID Vulnerability
ID data

India: Government ID

China: What’s your Social Credit?

Government-controlled ID Vulnerability

Government-controlled ID Vulnerability

Government-controlled ID Vulnerability

3rd
Generation Digital ID
Distributed Ledger (e.g., blockchain)
You Person/Org/Thing (“peer”)
“Decentralized & Self-Sovere...

did:example:123456789abcdefgh
i
did:sov:4e6cf0ed2d8bbf1fbbc9f2a100

Decentralized Identifier (DID)
Format: “did:” + <method> + “:” <method-specific identifier>
Example: did:sov:4e6cf0ed2d8bb...

DID Document Example
{
"@context": "https://w3id.org/did/v1",
"id": "did:example:123456789abcdefghi",
"publicKey": [{
"id"...

Verifiable Claim: Are you 21?
VerifierHolderIssuer
Wallet
blockchain
Decentralized Identifiers
Counter-signed claim

From Who to What
Diver’s
License
Domain Name
Registrar DB
Legal name
Address
DOB
Eye color
Height
Diploma Alumni
Club DB
L...

From Who to What
Claim:
Owns domain
Claim:
Graduated
Domain Name
Registrar
Alumni
Club

DID Benefits for Users
● Permanent control of identifier
● Multiple authorities can issue multiple claims
● Preserves priv...

DID Benefits for Service Providers
● Reduces cost & risk of identity proofing
● Reduce need to retain data, which lowers
p...

DID Summary
● Pairwise pseudonymous
– One for each relationship
● Permanent
● Resolvable
● Cryptographically verifiable
● ...

W3C Standard Efforts
● Verifiable credentials
● DID Auth
● DKMS (Decentralized Key Management System)
● DID

Interesting Projects

Whoever controls the guys with the guns
can also control any system governed by
people they can point the guns at.

Vulnerability?
Acme ID Foundation, Inc.
(permissioned blockchain)
Decentralized
Identity Platform

Why?
Civic
Decentralized
Identity Platform
(Bitcoin Rootstock)
CVC Token
(Ethereum-based)

“...the main benefits are lost of if a
trusted third party is still required...”

Is permissionless decentralized ID possible?

Poker Players

Kuwa Sponsors
− Facilitate and pay for registrations
− Any type of entity

Kuwa Registrars
− Independent,...

Kuwa
Registration
Smart Contract
+ video & social graph
Registrar #NRegistrar #1
Poker Protacol Simple Example
Registrar #...

Standards Efforts
https://erc725alliance.org/
https://www.hyperledger.org/projects/hyperledger-indy
https://www.w3.org/com...

Thanks!

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