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Human Auth SDK

The Human Auth SDK by InterLink enables any application to integrate Single Sign-On (SSO) functionality, tied not to wallets or email addresses, but to verified human identity.

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Last updated 1 month ago

Unlike typical SSO systems tied to centralized identity providers (e.g., Google or Facebook), InterLink SSO uses on-chain, biometric-anchored identity, ensuring each login is performed by a unique, verified human.

Components

  • InterLink SDK (frontend): injected into web/mobile client

  • InterLink App (mobile): handles secure biometric confirmation

  • Verifier Node: decentralized endpoint (on-chain or light node) that verifies signed payloads

  • Credential Resolver (optional): fetches and validates user-bound credentials (e.g., passport, age proof)

Core Capabilities

  • Biometric-based login (liveness, uniqueness enforced)

  • JWT or ZK-style signed assertions of human = true, age > 18, or has_passport = true

  • InterChain identity binding — InterLink ID can be mapped to wallets across EVM, Solana, Cosmos, etc.

  • Offline-capable — signatures cached locally; used for dApps with intermittent connectivity

  • No PII transmission — biometric and credential data remain on-device, never exposed

Integration Highlights

  • Web2-ready: SDK available as JavaScript module, RESTful fallback

  • Web3-native: Pluggable with WalletConnect, Ethers.js, wagmi

  • Mobile-ready: React Native and Flutter bridges supported

  • Developer Options: Verify-only (read a Human)

  • Challenge flow (return signed payload for replay protection)

  • Credential gate logic (use cases: age, residency, document check)