Decentralized Identity

You

You to Carol as sibling

You to PwC as employee

You to Germany as citizen

You to Bob as friend

Relationships

You

Attributes

You

Your cloud service

Your lawyer

Agents

You

Relationships

Attributes

Agents

Decentralized Identity

• Self-sovereign
• Cryptographically verifiable
• Person vs. profiles

• No more passwords, no more social logins
• W3C working group
• 27 identity provider methods

did:example:123456789abcdefghi

App

App

App

Network

š© microsoft.com/ownyouridentity

blockstack.org/install

browser.blockstack.org

Create Blockstack ID

Create Blockstack ID

Protect Blockstack ID

Recover Blockstack ID

Use Blockstack ID

Sign In

Define your App Configuration:

• Scope
• App domain
• Redirect path
• Manifest path

Sign In

yarn add blockstack

import {UserSession} from 'blockstack'

const userSession = new UserSession()

Provide a sign in button

Sign In

document.getElementById('signin').onclick = () => {
  userSession.redirectToSignIn()
}

And call redirectToSignIn()

• The domain name your app is served from.
• The permissions and data your app is requesting.
• Your app's name.
• Your app's logo.

Sign In

Sign In

// Check for the auth response token in the URL, 
// provided by the browser redirect.
if (userSession.isSignInPending()) {

   // Decodes the token and retrieves user data.
   userSession.handlePendingSignIn()
     .then((userData) => {
     

       // Refresh main page once signed in.

       window.location = window.origin 
     })
}

Sign In

if (userSession.isSignInPending()) {
  ...

} else if (userSession.isUserSignedIn()) {
   var userData = userSession.loadUserData()
   
   // Do something with user profile data..
   showProfile(userData.profile)
}

Sign In

{
 "username": "matt.id",
 "profile": {
   "name": "Matthew Little",
   "image": [{
     "name": "avatar",
     "contentUrl": "https://gaia-matt.com/1159ZPz88pypemHP84SMacuJWa3XmFSKcv/avatar.png"
   }]
 },
 "email": "matthew@blockstack.com",
 "decentralizedID": "did:stack:1159ZPz88pypemHP84SMacuJWa3XmFSKcv",
 "hubUrl": "https://gaia-matt.digitaloceanspaces.com/1QHGBN4d2WtnHgEFhsMpAqcJAL2Sy76zoK/",
 "appPrivateKey": "6660d3ce7f79038aa5cadb7305897d9a20cfd95ed764c28bd3ffd2618c610553"
}

Example User Data

Sign In

{
 "username": "matt.id",
 "profile": {
   "name": "Matthew Little",
   "image": [{
     "name": "avatar",
     "contentUrl": "https://gaia-matt.example.com/1159ZPz88pypemHP84SMacuJWa3XmFSKcv/avatar.png"
   }]
 },
 "email": "matthew@blockstack.com",
 "decentralizedID": "did:stack:1159ZPz88pypemHP84SMacuJWa3XmFSKcv",
 "hubUrl": "https://gaia-matt.digitaloceanspaces.com/1QHGBN4d2WtnHgEFhsMpAqcJAL2Sy76zoK/",
 "appPrivateKey": "6660d3ce7f79038aa5cadb7305897d9a20cfd95ed764c28bd3ffd2618c610553"
}

Example User Data

App Key Generation

© Cogarius, Brussels

More APIs

None for private key so far

Decentralized Storage

Decentralized Storage

• Diversity in locations
• Distributed vs. self-controlled

Server-less apps

User based (S3, Azure,..)

Content based (IPFS, Storj, SSB, ..)

Address based (Gaia)

Gaia Storage

Address-based access protocol

Apps for My Data

My storage

Apps for My Data

My storage

Write data

  var statusMsg = 'Hello! 🚀'

  userSession.putFile('status.txt', statusMsg)
    .then(() => {
      console.log('file updated!')
    })

Gaia Storage

Read data

  
  userSession.getFile('status.txt')
    .then((statusMsg) => {
      console.log('Status: ' + statusMsg)
     })

Gaia Storage

   Console
   > Status: Hello! 🚀

Sharing Data/Multi-user apps

  "apps": {
   "https://app.graphitedocs.com": "https://gaia-matt.com/1QHGBN4d2WtnHgEFhsMpAqcJAL2Sy76zoK/",
   "https://helloblockstack.com": "https://gaia-matt.com/1KBU9qxDg8xMgyFdwiVDGU4RZr16Z7TB2S/"
  }

Gaia Storage

publish_data

scope in AppConfig:

Sharing Data/Multi-user apps

   // Upload unencrypted, public file (logged in as friedger.id)
   var options = { encrypt: false }
   var statusMsg = 'Hello! 🚀'
   userSession.putFile('status.txt', statusMsg, options).then(() => {
     console.log('uploaded publicly accessible file!')
   })

Gaia Storage

Sharing Data/Multi-user apps

   // Get file for specific user (logged in as alice.id)
   var options = {
     username: 'friedger.id',
     decrypt: false
   }
   userSession.getFile('status.txt', options).then((msg) => {
     console.log(`Got status for ${options.username}: ${msg}`)
   })

Gaia Storage

Sharing Data/Multi-user apps

   // Upload unencrypted, public file (logged in as friedger.id)
   var options = { encrypt: false }
   var statusMsg = userSession.encryptContent('Hello! 🚀',  
                                               { publicKey: alicePubKey })
   userSession.putFile('status.txt', statusMsg, options).then(() => {
     console.log('uploaded publicly accessible file!')
   })

Gaia Storage

Sharing Data/Multi-user apps

   // Get file for specific user (logged in as alice.id)
   var options = {
     username: 'friedger.id',
     decrypt: false
   }
   userSession.getFile('status.txt', options).then((encMsg) => {
     var msg = userSession.decryptContent(encMsg, 
                                             { privateKey: myPrivKey})
     console.log(`Got status for ${options.username}: ${msg}`)
   })

Gaia Storage

Indexer

OI Calendar

cal.openintents.org

react-redux CRUD + bigcalendar
https://github.com/yasnaraj/react-calendar-events-example

Add Auth Reducer

Update Event Reducer

Developer Tools

• Authentication
• Storage (Gaia)
  • Files
  • Collections
• Encryption
• In-app payment

Javascript
Android, iOS, React Native
 

Gatsby starter library

yeoman generator-blockstack

Client side

Developer Tools

Infrastructure
 

blockstack-core

gaia

Integrations
 

omniauth-blockstack

blockstack-ruby

Server side

App Mining

The better the app,
the more you earn.

• app.co/mining
• Monthly rating
• Monthly payout
  currently: $100k

App Reviewers

• Product Hunt: Innovation
• TryMyUI: Usability
• New Internet Labs: Good Citizenship
• Awario: Awareness

Ranking

Rewards

Review the reviewers

Future

• Bigger monthly payout
• Long-tail
• Payout in STX
  (mining reward distribution)

Hackathon