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ICP Developer Docs

Internet Identity Specification

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Reference for the Internet Identity protocol. Cover delegation chain structure, passkey management (WebAuthn, platform authenticators), canister signatures, alternative origins mechanism, and session management. Link to the full II specification and the II canister source.

  • Portal: references/ (II section)
  • icskills: internet-identity
  • guides/authentication/internet-identity — practical integration guide
  • reference/system-canisters — II canister ID