Passkeys and Identity Federation @ OpenID Summit Tokyo 2024

下記イベントの発表資料です。
https://www.openid.or.jp/summit/2024/#event-outline

1. Passkeys and Identity Federation ritou ~ OpenID Summit Tokyo 2024 ~
2. Contents • Features • Bene fi ts of supporting passkeys for each IdP/RP of ID Federation • Related Speci fi cations 2
3. Features
4. Passkey • Security • Public Key Cryptography • Phishing Resistance • Usability • Local Authentication • Synced Passkey with Password Manager 4
5. Passkey • Issues • Account Recovery • Cross-platform Synchronization • Phase • 2023: Management, SignIn • 2024: SignUp, Migration from Password 5
6. ID Federation • Usage • Authentication • Identity Proo fi ng • OpenID Connect • Widely Supported Environment • Extensions for Various Use-cases 6
7. ID Federation • Issues • UX without Browser Mediation • Privacy Risk • IdP-induced Trouble • Unsupported Speci fi cations 7
8. Passkey for ID Federation RP
9. Passkey Advantage as Authentication Method • UX with Conditional Mediation • Reduced Privacy Risk • Controllable Authenticator-induced Trouble • Ease of use for Re-Authentication 9
10. Complement ID Federation with Passkey • Usability Improvement • Appeal to users who avoid ID Federation 10 4JHO*O
    XJUI
    ʜ
11. Complement Passkey with ID Federation • Strong authentication method options • Support for Passkey unavailable environments 11 w 1BTTXPSE
    
    w 1BTTXPSE
    
    
    5051
    w 1BTTLFZ w *%
    'FEFSBUJPO
    w 1BTTLFZ
12. Passkey for ID Federation IdP
13. Advantages of IdP using Passkey • Protect multiple RPs • Account Recovery(MFA Options, ID Proo fi ng) 13 1BTTLFZ *E1 31 31 31 31
14. Related OIDC / OAuth 2.0 Specs
15. OpenID Connect Core 1.0 15 31 01 End User (1) Request Authentication (2) Authentication Request (3) User Interaction (4) Authentication Response
16. OpenID Connect Core 1.0 16 31 01 End User (1) Request Authentication (2) Authentication Request (3) User Interaction (4) Authentication Response 1BTTLFZ
    
17. OpenID Connect Core 1.0 17 31 01 End User (1) Request Authentication (2) Authentication Request (3) User Interaction (4) Authentication Response 1BTTLFZ
    BDS@WBMVFT
    
    DMBJNT BDS
    
    BNS
18. OpenID Connect Core 1.0 18 31 01 End User (1) Request Authentication (2) Authentication Request (3) User Interaction (4) Authentication Response 3F"VUI
    X
    1BTTLFZ
    BDS@WBMVFT
    
    DMBJNT
    NBY@BHF
    MPHJO@IJOU JE@UPLFO@IJOU
    BDS
    
    BNS
    BVUI@UJNF
19. OpenID Connect Core 1.0 • Authentication Request Parameters for End-User Authentication • acr_values, claims • Claims for End-User Authentication • acr, amr, auth_time • Authentication Request Parameters for Re-Authentication • max_age, login_hint, id_token_hint 19
20. OpenID Connect Extended Authentication Pro fi le (EAP) ACR Values 1.0 (draft 01) 20 31 01 End User (1) Request Authentication (2) Authentication Request (3) User Interaction (4) Authentication Response 1BTTLFZ
    BDS
    
    BNS BDS@WBMVFT
    
    DMBJNT
21. OpenID Connect Extended Authentication Pro fi le (EAP) ACR Values 1.0 (draft 01) • “acr” • “phr”: Phishing-Resistant • “phrh”: Phishing-Resistant Hardware-Protected • “amr” • “pop”: Proof-of-possession of a key • Other value is de fi ned in RFC8176 21
22. RFC 9470 : OAuth 2.0 Step Up Authentication Challenge Protocol 22 31 01 End User (1) Request Authentication (2) Authentication Request (3) User Interaction (4) Authentication Response 3FTPVSDF
    4FSWFS (5) Resource Access
23. RFC 9470 : OAuth 2.0 Step Up Authentication Challenge Protocol 23 31 01 End User (1) Request Authentication (2) Authentication Request (3) User Interaction (4) Authentication Response 3FTPVSDF
    4FSWFS (5) Resource Access BDS
    BVUI@UJNF BDS
    BVUI@UJNF 1BTTXPSE
    
24. RFC 9470 : OAuth 2.0 Step Up Authentication Challenge Protocol 24 31 01 End User (1) Request Authentication (2), (7) Authentication Request (3) User Interaction (4) Authentication Response 3FTPVSDF
    4FSWFS (5) Resource Access BDS
    BVUI@UJNF BDS
    BVUI@UJNF (6) Error with challenge 1BTTLFZ
    BDS@WBMVFT
    
    DMBJNT
    NBY@BHF BDS
    NBY@BHF
25. RFC 9470 : OAuth 2.0 Step Up Authentication Challenge Protocol • Use-case • IdP: Authentication/Authorization Service • RP: SPA/Native App • RS: Payment, Healthcare, … 25
26. Summary • Passkey and ID Federation have distinct features and complement each other when combined • There are bene fi ts to both IdP and RP in ID Federation to support passkey • Let's support speci fi cations for handling authentication states 26
27. Fin @ritou