Sign-In with Ethereum
Summary
Sign-In with Ethereum describes how Ethereum accounts authenticate with off-chain services by signing a standard message format parameterized by scope, session details, and security mechanisms (e.g., a nonce). The goals of this specification are to provide a self-custodied alternative to centralized identity providers, improve interoperability across off-chain services for Ethereum-based authentication, and provide wallet vendors a consistent machine-readable message format to achieve improved user experiences and consent management.
Why It Matters
ERC-4361 provides a standardized way for apps to authenticate users via wallets rather than traditional web2 login systems. Wallets supporting this standard can present a clear sign-in request details to users, improving the UX and security of signing in with a wallet.
