Decentralized Identities-July 2020 community call

Microsoft identity platform
July 16, 2020
Community call
Decentralized Identities
Matthijs Hoekstra
Microsoft
@mahoekst

Introduction
• First things first
• Please note: We are recording this call so those unable to attend can benefit from the recording.
• This call is designed for developers who implement or are interested in implementing Microsoft identity platform
solutions.
• What kind of topics will we discuss?
• We will address development related topics submitted to us by the community for discussion.
• We build a pipeline of topics for the next few weeks, please submit your feedback and topic suggestions -
https://aka.ms/IDDevCommunityCallSurvey
• View recordings on the Microsoft 365 Developer YouTube channel - https://aka.ms/M365DevYouTube
• Follow us on Twitter @Microsoft365Dev and @azuread
• This is NOT a support channel. Please use Stack Overflow to ask your immediate support related questions.
• When is the next session?
• Community Calls: Monthly – 3rd Thursday of every month
• Next Identity Developer Community Call: Aug 20th

Your Identity == App(username, password)

u s e r n a m e
l l l l l l l lYour Identity > App(username, password)

Your Identity > App(username, password)
play
purchases
education
achievements
interests
work citizenship
u s e r n a m e
l l l l l l l l

Your Identity > App(username, password)
u s e r n a m e
l l l l l l l l
play
purchases education
achievements
interests
work citizenship

Your Identity App(username, password)
Endless breaches
of personal data
Billions spent
on audits
1B+ displaced
without any ID
?
In some cases,
disappear

• Privacy and control of
my identity and data
• Protection from hacks
• Protection from breaches
Individuals
• Trust, and Verify
• Collaborate with everyone
• Reduce risk for GDPR, KYC/AML
Organizations
• ID for cross border & agency
• Digital ID for refugees
• Social and financial inclusion
for everyone
Governments

u s e r n a m e
l l l l l l l l
play
purchases education
achievements
interests
work citizenship

u s e r n a m e
l l l l l l l l

Each of us needs digital identity we own and
control, one which securely and privately stores all
elements of our digital identity.
This self-owned identity must seamlessly integrate
into our lives and give us complete control over
how our identity data is accessed and used.

To: Alice Smith
ContosoRegistrar
5/6/2020 9:30 AM
YourDigital Student IT isavailable
CR
CR
Add to Wallet
Contoso Registrar
Wed 9:30AMYourDigitalStudentITisavailable
Hi Alice, Your digital student ID is here. Contoso

Users
Identity Hub
Universal Resolver
People,Apps,
andDevices
Stage: Working Implementations
W3C Decentralized Identifiers
Stage: Published Standard
Decentralized Systems · Blockchains and Ledgers
CCG
DID Authentication
W3C Verifiable Credentials
Stage: Published Standard
User Agent
did://
Join, collaborate, and contribute

What’s an Verifiable Credential?

Configure credential issuance
Administrator
Contoso admin sets up an issuer
that will produce verifiable
credentials:
1. Provide an Azure Key Vault
2. Associate a verified
DNS domain
3. A DID is registered

Configure credential look and feel
Administrator
Contoso admin customizes
branding of their credentials.
1. Choose a card color.
2. Upload icons & images.
3. Provide helpful text.

Markup for defining look & feel of a card
{
"locale": "en-US",
"contract": "https://identity.microsoft.com/76B0B89D-4D7D...”,
"card": {
"title": "Student ID Card",
"issuedBy": "Contoso University",
"backgroundColor": "#000000",
"textColor": "#FFFFFF",
"logo": {
"uri": "https://contosouniversity.edu/studentIdCard/logo.png",
"description": “Student ID Card Logo"
},
}
"consent": {
"title": "Do you want to be issued this card...?",
"instructions": "You will need to sign into your school..."
},
"claims": {
"vc.credentialSubject.studentId": {
"type": "Number",
"label": “Student ID Number"
},
"vc.credentialSubject.expiration": {
"type": "Date",
"label": "Card Expires At"
},
"vc.credentialSubject.studentProfilePicture": {
"type": "base64Image",
"label": "Profile Picture",
"description": "A student’s profile picture"
}
}
}

{
"locale": "en-US",
"card": {
"logo": {
},
}
"consent": {
},
"claims": {
{
"locale": "en-US",
"card": {
"logo": {
},
}
"consent": {
},
"claims": {
"type": "Number",
},
"type": "Date",
},
}
}
}
Customize the look
& feel of the card

}
"consent": {
},
"claims": {
"type": "Number",
},
"type": "Date",
},
}
}
}
Provide text strings
for credential data
{
"locale": "en-US",
"card": {
"logo": {
},
}
"consent": {
},
"claims": {
"type": "Number",
},
"type": "Date",
},
}
}
}

Contract describes requirements for issuance
{
"credentialIssuer": "https://portableidentitycards.azure-api...",
"issuer": "did:ion:z6MkjRagNiMu91DduvCvgEsqLZDVzrJzFrwahc4tXLt9DoHd",
"vc": {
"type": [ "https://contosouniversity.edu/StudentIdCredential" ] // the type of the credential, used by verifiers to request
},
"validityInterval": 2592000, // expiration of a credential, in seconds
"attestations": {
"selfIssued": {}, // values the user can provide directly
"presentations": {}, // credentials the user must provide
"idTokens": [ // identity providers the user must authenticate with
{
"mapping": { // define which claims should be included in credentials
"studentId": { "claim": “studentId" },
"firstName": { "claim": "given_name" },
"lastName": { "claim": "family_name" }
},
"configuration": "https://contoso.edu/.well-known/openid-configuration",
"client_id": "40be4fb5-7f3a-470b-aa37-66ed43821bd7",
"redirect_uri": “https://contosouniversity.edu/verify"
}
],
},
}

{
"vc": {
"type": [ "https://contosouniversity.edu/StudentIdCredential" ] // the type of the credential, used
},
"attestations": {
{
},
{
"vc": {
},
"signingKeys": [ // details of the signing keys used to issue credentials
{
"kid": "did:ion:test:EiBBk-jMkByqfJPKTSYJENy5XKRIq8p...",
"key": "https://mykeyvault12.vault.azure.net/...",
"authorization": { "method": "msi" }
}
]
"attestations": {
{
},
}
],
},
}
Configure properties of the issued credential

{
}
]
"attestations": {
{
},
}
],
{
"vc": {
},
{
}
]
"attestations": {
{
},
}
],
},
}
Define requirements
to issue a new credential

Request issuance of a credential · OpenID request
// JWT header
{
"alg": "ES256K",
"typ": "JWT",
"kid": "did:ion:z6MkjRagNiMu91DduvCvgEsqLZDVzrJzFrwahc4tXLt9DoHd#veri-key1"
}
.
// JWT payload
{
"iss": "did:ion:z6MkjRagNiMu91DduvCvgEsqLZDVzrJzFrwahc4tXLt9DoHd",
"response_type": "id_token",
"client_id": "https://contosouniversity.edu/presentation/request",
"redirect_uri": "https://contosouniveristy.edu/presentation/response",
"scope": "openid did_authn",
"state": "af0ifjsldkj",
"nonce": "n-0S6_WzA2Mj",
"response_mode" : "form_post",
"prompt": "create",
"registration" : {
"client_name": "Contoso University",
"jwks_uri" : "https://uniresolver.io/1.0/identifiers/did:ion:z6MkjR...",
"id_token_signed_response_alg" : [ "ES256K", "EdDSA", "RS256" ]
},
"attestations": {
"presentations": [
{
"credentialType": "https://contosouniversity.edu/StudentIdCredential",
"contracts": ["https://credentials.msidentity.microsoft.com/.../studentId"]
}
]
}
}
.
// JWT signature
KLJo5GAyBND3LDTn9H7FQokEsUEi8jKwXhGvoN3JtRa51xrNDgXDb0cq1UTYB-rK4Ft9YVmR1NI_ZOF8oGc_...

"client_id": "https://contosouniversity.edu/presentation/request",
"redirect_uri": "https://contosouniveristy.edu/presentation/response",
"prompt": "create",
"registration" : {
"client_name": "Contoso University",
},
"attestations": {
"presentations": [
{
}
]
}
}
.
// JWT signature
KLJo5GAyBND3LDTn9H7FQokEsUEi8jKwXhGvoN3JtRa51xrNDgXDb0cq1UTYB-rK4Ft9YVmR1NI_ZOF8oGc_...
// JWT header
{
"alg": "ES256K",
"typ": "JWT",
}
.
// JWT payload
{
"client_id": "https://contosouniveristy.edu/presentation/response",
"registration" : {
},
"contract": "https://credentials.msidentity.microsoft.com/.../studentId"
}
.
// JWT signature
KLJo5GAyBND3LDTn9H7FQokEsUEi8jKwXhGvoN3JtRa51xrNDgXDb0cq1UTYB-rK4Ft9YVmR1NI_ZOF8oGc_7wAp
8PHbF2HaWodQIoOBxxT-4WNqAxft7ET6lkH-4S6Ux3rSGAmczMohEEf8eCeN-jC8WekdPl6zKZQj0YPB
1rx6X0-xlFBs7cl6Wt8rfBP_tZ9YgVWrQmUWypSioc0MUyiphmyEbLZagTyPlUyflGlEdq

{
"registration" : {
},
"attestations": {
"presentations": [
{
}
]
}
}
.
// JWT header
{
"alg": "ES256K",
"typ": "JWT",
}
.
// JWT payload
{
"registration" : {
},
}
.
// JWT signature
Request points to
a specific contract

}
.
// JWT payload
{
"registration" : {
},
}
.
// JWT signature
// JWT header
{
"alg": "ES256K",
"typ": "JWT",
}
.
// JWT payload
{
"registration" : {
},
}
.
// JWT signature
Request is signed
by the issuer

Sign in
Student
Student browses to the Contoso
U portal and installs the PIC.
1. Go to the portal
2. Scan the code
3. Authenticate

OpenID request & response to university identity provider
https://contosouniversity.edu/openid/authorize?
client_id=eae8b7f2-dd72-4f63-98f0-2d5399d61508
&redirect_uri=openid://response
&state=ajflafn3o2n651oh56161631
&response_mode=fragment
&response_type=id_token
&scope=openid
// JWT header
{
"alg": "ES256K",
"typ": "JWT",
"kid": “fjaklnk3n153n15"
}
.
// JWT payload
{
"iss": "https://contosouniversity.edu",
"exp": 1311281970,
"iat": 1311280970,
"firstName": "Alice",
"lastName": "Smith"
"studentId": “21905716"
}
.
// JWT signature
hhbXBsZS5jb20va2V5cy9mb28uandrIiwibmJmIjoxNTQxNDkzNzI0LCJpYXQiO

&scope=openid
// JWT header
{
"alg": "ES256K",
"typ": "JWT",
}
.
// JWT payload
{
&scope=openid
// JWT header
{
"alg": "ES256K",
"typ": "JWT",
}
.
// JWT payload
{
"exp": 1311281970,
"iat": 1311280970,
"lastName": "Smith"
"studentId": “21905716"
}
.
// JWT signature
A standard OpenID Connect
authorize request

// JWT header
{
"alg": "ES256K",
"typ": "JWT",
}
.
// JWT payload
{
"exp": 1311281970,
"iat": 1311280970,
"lastName": "Smith"
"studentId": “21905716"
}
.
// JWT signature
&scope=openid
// JWT header
{
"alg": "ES256K",
"typ": "JWT",
}
.
// JWT payload
{
"exp": 1311281970,
"iat": 1311280970,
"lastName": "Smith"
"studentId": “21905716"
}
.
// JWT signature
An id_token is returned to Authenticator
as a proof

Format of an issued verifiable credential
// Verifiable Credential as a JWT
{
"alg": "RS256",
"typ": "JWT",
"kid": "did:example:issuer#keys-1"
}.
{
"sub": "did:ion:njn9416416zgf1qp316n1lkjl5n1jap980h1", // The user’s DID
"jti": "http://contosouniversity.edu/credentials/3732",
"iss": "did:ion:z6MkjRagNiMu91DduvCvgEsqLZDVzrJzFrwahc4tXLt9DoHd ", // The issuer’s DID
"nbf": 1541493724,
"iat": 1541493724,
"exp": 1573029723, // The expiration of the credential
"vc": {
"@context": [
"https://www.w3.org/2018/credentials/v1",
"https://contosouniversity.edu"
],
"type": ["VerifiableCredential", "StudentIDCredential"], // The type of the credential
"credentialSubject": { // The claims in the credential
"studentId": "21905716"
},
"credentialStatus": {
"type": "CredentialRevocatinMechanism",
"id": "https://credentials.msidentity.microsoft.com/api/v1.0/portable/status”
}
}
}.
KLJo5GAyBND3LDTn9H7FQokEsUEi8jKwXhGvoN3JtRa51xrNDgXDb0cq1UTY...

{
"alg": "RS256",
"typ": "JWT",
}.
{
"nbf": 1541493724,
"iat": 1541493724,
"nonce": "660!6345FSer",
"vc": {
"@context": [
],
Follows W3C standard for
Decentralized Identifiers.
{
"alg": "RS256",
"typ": "JWT",
}.
{
"nbf": 1541493724,
"iat": 1541493724,
"nonce": "660!6345FSer",
"vc": {
"@context": [
],
"studentId": "21905716"
},
}
}
}.

"nbf": 1541493724,
"iat": 1541493724,
"nonce": "660!6345FSer",
"vc": {
"@context": [
],
"studentId": "21905716"
},
}
}
}.
Follows W3C standard
for verifiable credentials.
{
"alg": "RS256",
"typ": "JWT",
}.
{
"nbf": 1541493724,
"iat": 1541493724,
"nonce": "660!6345FSer",
"vc": {
"@context": [
],
"studentId": "21905716"
},
}
}
}.

"nonce": "660!6345FSer",
"vc": {
"@context": [
],
"studentId": "21905716"
},
}
}
}.
Credential is signed by issuer’s DID
{
"alg": "RS256",
"typ": "JWT",
}.
{
"nbf": 1541493724,
"iat": 1541493724,
"nonce": "660!6345FSer",
"vc": {
"@context": [
],
"studentId": "21905716"
},
}
}
}.

Request presentation of a credential: OpenID request
// JWT header
{
"alg": "ES256K",
"typ": "JWT",
"kid": "did:ion:nmafdanafdaf12jkln1ln1hazhjanfu1#veri-key1"
}
.
// JWT payload
{
"iss": "did:ion:nmafdanafdaf12jkln1ln1hazhjanfu1",
"client_id": "https://bookstore.com/presentation/request",
"redirect_uri": "https://bookstore.com/presentation/response",
"registration" : {
"client_name": "Fabrikam Bookstore",
},
"attestations": {
"presentations": [
{ "credentialType": "https://contosouniversity.edu/StudentIdCredential" }
]
}
}
.
// JWT signature

"client_id": "https://bookstore.com/presentation/response",
"registration" : {
"jwks_uri" : "https://uniresolver.io/1.0/identifiers/ did:ion:nmaf...",
},
"attestations": {
"presentations": [
]
}
}
.
// JWT signature
// JWT header
{
"alg": "ES256K",
"typ": "JWT",
}
.
// JWT payload
{
"registration" : {
},
“attestations":
"id_token": {
"https://contosouniversity.edu/StudentIdCredential": {
"essential": "true",
"purpose": "To prove you are a student.",
}
}
}
.
// JWT signature

"registration" : {
},
"attestations": {
"presentations": [
]
}
}
.
// JWT signature
Request describes the requested
credentials.
// JWT header
{
"alg": "ES256K",
"typ": "JWT",
}
.
// JWT payload
{
"registration" : {
},
“attestations":
"id_token": {
}
}
}
.
// JWT signature

"registration" : {
},
“attestations":
"id_token": {
}
}
}
.
// JWT signature
Request is signed by verifier’s DID
// JWT header
{
"alg": "ES256K",
"typ": "JWT",
}
.
// JWT payload
{
"registration" : {
},
“attestations":
"id_token": {
}
}
}
.
// JWT signature

Presentation of a credential: OpenID Response
// Verifiable Credential included in presentation
{
"alg": "RS256",
"typ": "JWT",
}.
{
"sub": "did:ion:njn9416416zgf1qp316n1lkjl5n1jap980h1",
"iss": "did:ion:z6MkjRagNiMu91DduvCvgEsqLZDVzrJzFrwahc4tXLt9DoHd ",
"nbf": 1541493724,
"iat": 1541493724,
"exp": 1573029723,
"vc": {
"@context": [
],
"type": ["VerifiableCredential", "StudentIDCredential"],
"credentialSubject": {
"studentId": "21905716"
},
}
}
}.
// Sent via HTTP POST
// JWT header
{
"alg": "ES256K",
"typ": "JWT",
"kid": "did:example:subject#key-1"
}
.
// JWT payload
{
"iss": "https://self-issued.me",
"exp": 1311281970,
"iat": 1311280970,
"sub_jwk" : {
"crv":"secp256k1",
"kid":"did:example:subject#verikey-1",
"kty":"EC",
"x":"7KEKZa5xJPh7WVqHJyUpb2MgEe3nA8Rk7eUlXsmBl-M",
"y":"3zIgl_ml4RhapyEm5J7lvU-4f5jiBvZr4KgxUjEhl9o"
},
"sub": "9-aYUQ7mgL2SWQ_LNTeVN2rtw7xFP-3Y2EO9WV22cF0",
"did": "did:ion:njn9416416zgf1qp316n1lkjl5n1jap980h1",
"vp": "eyJhbGciOiJIUzI1NiIsI..." // Verifiable Presentation see content to the right
}
.
// JWT signature
jE1NDE0OTM3MjQsImV4cCI6MTU3MzAyOTcyMywibm9uY2UiOiI2NjAhNjM0NUZTZXIiLCJ2YyI6eyJAY
29udGV4dCI6WyJodHRwczovL3d3dy53My5vcmcvMjAxOC9jcmVkZW50aWFscy92MSIsImh0dHBzOi8vd

// JWT header
{
"alg": "ES256K",
"typ": "JWT",
}
.
// JWT payload
{
"exp": 1311281970,
"iat": 1311280970,
"sub_jwk" : {
"crv":"secp256k1",
"kty":"EC",
},
"vp": {
"@context": [ "https://www.w3.org/2018/credentials/v1"],
"type": ["VerifiablePresentation"],
"verifiableCredential": ["eyJhbGciOiJIUzI1NiIsI..."] }
}
.
// JWT signature
{
"alg": "RS256",
"typ": "JWT",
}.
{
"nbf": 1541493724,
"iat": 1541493724,
"exp": 1573029723,
"nonce": "660!6345FSer",
"vc": {
"@context": [
],
"studentId": "21905716"
},
}
}
}.
DID in presentation matches
subject of issued credential
"did:ion:njn9416416zgf1qp316n1lkjl5n1jap980h1"
"did:ion:njn9416416zgf1qp316n1lkjl5n1jap980h1"
// JWT header
{
"alg": "ES256K",
"typ": "JWT",
}
.
// JWT payload
{
"exp": 1311281970,
"iat": 1311280970,
"sub_jwk" : {
"crv":"secp256k1",
"kty":"EC",
},
"vp": {
"@context": [ "https://www.w3.org/2018/credentials/v1"],
"type": ["VerifiablePresentation"],
"verifiableCredential": ["eyJhbGciOiJIUzI1NiIsI..."] }
}
.
// JWT signature
Presentation of a credential: OpenID Response
{
"alg": "RS256",
"typ": "JWT",
}.
{
"nbf": 1541493724,
"iat": 1541493724,
"exp": 1573029723,
"nonce": "660!6345FSer",
"vc": {
"@context": [
],
"studentId": "21905716"
},
"id": "https://credentials.msidentity.microsoft.com/api/v1.0/portable/status
}
}
}.

https://github.com/microsoft/VerifiableCredentials-
Verification-SDK-Typescript
https://github.com/microsoft/VerifiableCredentials-
Crypto-SDK-Typescript
https://github.com/microsoft/VerifiableCredential-
SDK-Android

Help RPs to work with
Verifiable Credentials
Validate tokens (SI, id
tokens, VCs, VPs,
Issuance and Present
SIOP)
Create SIOP requests
Supports signing
with/or without Key
Vault
Serves as a
specification for
customers using other
stacks

aka.ms/didwhitepaper
aka.ms/opendid
https://didproject.azurewebsites.net/

Microsoft 365
https://aka.ms/adaptivecardscommunitycall
https://aka.ms/microsoftgraphcall
https://aka.ms/IDDevCommunityCalendar
https://aka.ms/microsoftteamscommunitycall
https://aka.ms/officeaddinscommunitycall
https://aka.ms/powerappscommunitycall
https://aka.ms/spdev-call
https://aka.ms/spdev-sig-call
https://aka.ms/spdev-spfx-call
https://aka.ms/M365DevCalls

Recording will be available soon on our
Microsoft 365 Developer YouTube channel
https://aka.ms/M365DevYouTube
(subscribe today)
Follow us on Twitter
@Microsoft365Dev and @azuread
Next call: August 20th at 9:00am PST
https://aka.ms/IDDevCommunityCalendar
Thank you

Decentralized Identities-July 2020 community call

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Editor's Notes