ChainAuth

Blockchain-based authentication using your Ethereum wallet via Metamask.

Background

Based on ERC-4361: Sign-In with Ethereum

Off-chain authentication for Ethereum accounts to establish sessions.

• https://eips.ethereum.org/EIPS/eip-4361

Use-case

• De-centralized digital identity
• Single sign-on (SSO) with any blockchain

Advantages

• No username/password auth
• You don't need to remember or save your username or passwords anymore
• Governed by security mechanisms of blockchain and Ethereum
• SSO with same account on multiple platforms

Future Scope

• Multiple blockchain support (e.g. Stellar, Algorand)
• Multiple wallet support (e.g. Phantom, wallet connect)

References

• https://docs.metamask.io/wallet/how-to/sign-data/siwe
• https://auth0.com/blog/sign-in-with-ethereum-siwe-now-available-on-auth0/