Self Sovereign ID and Decentralized ID

Self introduction Copyright © 2020, Naohiro Fujie, All Rights Reserved
2

Today’s agenda items Copyright © 2020, Naohiro Fujie, All Rights
Reserved 3

• Identifier • Identity Japan Osaka Fujie Fujie Fujie Fujie
Copyright © 2020, Naohiro Fujie, All Rights Reserved 4

Identity https://blog.goodaudience.com/how-blockchain-could-become-the-onramp-towards-self-sovereign-identity-dd234a0ea2a3 Copyright © 2020, Naohiro Fujie, All Rights Reserved
5

Identity https://sovrin.org/faq/what-is-self-sovereign-identity/ recognizes an individual should own and control their
identity without the intervening administrative authorities Copyright © 2020, Naohiro Fujie, All Rights Reserved 6

Car rental Store Company Hospital User present identity by their
choice Trust issuers No need to validate identity by accessing issuers Issue identity Copyright © 2020, Naohiro Fujie, All Rights Reserved 7

Aspect Requirements for SSI Issues on current identity model Users
Do not rely on a specific identity provider Business continuity and availability If the identity provider stop their business, user can not use federated services. Account management All accounts are managed under policies of the identity provider and if they suspend the accounts, users can no longer use federated services. Privacy considerations IdPʼs awareness of users behaviours IdP can know which services the user wants to use by identity federation. Attribute management IdP and RP decide which attributes are provided between them Account linkage by correlation of RPs RP can know unintended attributes by correlation with other RPs Service Provide rs Able to trust identity which was presented by users Trust claim values Based on the identity proofing/KYC process on the IdP Trust issuers Pre-established trust(static trust) Copyright © 2020, Naohiro Fujie, All Rights Reserved 10

Aspect Requirements for SSI Issues on current identity model Users
Do not rely on a specific identity provider Business continuity and availability If the identity provider stop their business, user can not use federated services. Account management All accounts are managed under policies of the identity provider and if they suspend the accounts, users can no longer use federated services. Privacy considerations IdPʼs awareness of users behaviours IdP can know which services the user wants to use by identity federation. Attribute management IdP and RP decide which attributes are provided between them Account linkage by correlation of RPs RP can know unintended attributes by correlation with other RPs Service Provide rs Able to trust identity which was presented by users Trust claim values Based on the identity proofing/KYC process on the IdP Trust issuers Pre-established trust(static trust) Copyright © 2020, Naohiro Fujie, All Rights Reserved 11 3 1 5 4 2 6 Numbers in The Laws Of Identity in SSI

• How to trust issued claims • How to trust
the issuer Copyright © 2020, Naohiro Fujie, All Rights Reserved 14

Copyright © 2020, Naohiro Fujie, All Rights Reserved 15 Aspect
Requirements for SSI Issues on current identity model Users Do not rely on a specific identity provider Business continuity and availability If the identity provider stop their business, user can not use federated services. Account management All accounts are managed under policies of the identity provider and if they suspend the accounts, users can no longer use federated services. Privacy considerations IdPʼs awareness of users behaviours IdP can know which services the user wants to use by identity federation. Attribute management IdP and RP decide which attributes are provided between them Account linkage by correlation of RPs RP can know unintended attributes by correlation with other RPs Service Provide rs Able to trust identity which was presented by users Trust claim values Based on the identity proofing/KYC process on the IdP Trust issuers Pre-established trust(static trust)

choice Trust issuers No need to validate identity by accessing issuers Issue identity Copyright © 2020, Naohiro Fujie, All Rights Reserved 17 How to trust the presented identity without asking to the issuer

Sovrin Foundation’s governance model Holder /Prover Issuer Verifier Verifiable Credential
Proof Trust Trust Verifiable Credential Governanc e Authority Governance Framework Publishes Holder /Prover Issuer Verifier Verifiable Credential Proof Trust Copyright © 2020, Naohiro Fujie, All Rights Reserved 25

Copyright © 2020, Naohiro Fujie, All Rights Reserved 30 OIDC4IDA
VC Philosophy IdP centric User centric Focus on Identity verification on IdP Identity verification on RP Provides Verified identity information Verifiable identity information Based on Pre-established trust relationship between RP and IdP Immutability of a DLT

Copyright © 2020, Naohiro Fujie, All Rights Reserved 33 OpenID
Provider DID SIOP Wallet Holder Wallet Verifier KYC providers SIOP Wallet RP Issuer Presentation Exchange OIDC4IDA VC VC Presentation Exchange JWT VC JWT OIDC4IDA Distributed Claim OpenID Connect DID/VC

Copyright © 2020, Naohiro Fujie, All Rights Reserved 34 Write
issuing information In university Private sectors Inter universities Verify ceriticates Record students information - Digital student card - Identity proofing at online classes - Portable certificates - Inter universities ID federation - Digitalized certificates - Payment system integration Login with student ID Issue certificates (enrolment, graduates) Students ID federation Registration/Issue Use cases Digital Student Card Certificate Issuing sys ID platform Distributed Ledger Technology keio.jp

Self Sovereign ID and Decentralized ID

Self Sovereign ID and Decentralized ID

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