Natsuhiko Sakimura's journey and his contributions to digital identity

2025 January 3

Profile

  • Natsuhiko Sakimura Chair of the OpenID Foundation Board (2011~)
  • Outside Director of Authlete (2023-)

Initiatives

~ 2014
Open ID Connect development of
2014~
FAPI (Financial-grade API) Development and dissemination
Certification Programme Launch
Formal Analysis Incorporating it into the development process

Contribution to standardization

  • Linkability:Joint research with Pascal Paillier → ISO/IEC 27551 Requirements for attribute-based unlinkable entity authentication
  • Notice and consent:ISO/IEC 29184
  • Privacy Framework:ISO/IEC 29100:2024
These are also important factors to consider when thinking about the VC ecosystem.Critical FoundationBecome

Involvement with VC (Verifiable Credentials)

VCs were barely involved 📝
  • When Kristina (DCP WG Chair) was about to give up on selective disclosure, she proposed an approach similar to what we now call SD-JWT.
  • "I thought it wouldn't be finished by the time I retired."
    → Leaving it to the younger generation
HoweverIt's not like I had no connection to VC-like things 🔍
  • FAPIFirst Use CaseOne of:
    Based on bank identity verification
    ID Token + OIDC4IDA
    Issue Qualified Certificate

Recent concerns

  • Verifier validity :
    Is what the verifier is requesting valid?
  • Wallet Reliability :
    Is the wallet trustworthy?
  • Wallet Explosion
    Wallet/Credential Selection issue
EU: Will it be ready in time for 2026?