Sign in with Ethereum

Sign in with Ethereum (SIWE) is an authentication method for Ethereum accounts.

Key Benefits

🤝 Complements other elements of the Ethereum Identity Stack

After the user authenticates, apps may use their onchain ENS username and profile and EFP social graph.

⛓️ Enrich your app's UX with onchain data

Seamlessly connects user identity with onchain activities, enabling applications to verify user ownership of NFTs, tokens, and other blockchain assets.

🛡️ Self-Sovereign Identity

Users maintain control over their identity credentials, eliminating dependency on centralized identity providers like Google or Facebook.

🖊️ Single Sign-On

Works across any application that implements the SIWE standard, creating a unified authentication and account experience.

How It Works

SIWE follows a simple authentication flow:

1. Message Creation: Application generates a human-readable sign-in message containing domain, address, and security parameters, following the EIP-4361 standard.
2. User Signing: User signs the message with the Ethereum wallet of their choice.
3. Signature Verification: Application verifies the signature cryptographically to authenticate the user.
4. Session Establishment: Upon successful verification, a secure session is created for the authenticated user.

Open EIP standard

SIWE is defined by EIP-4361

Getting Started

Ready to implement SIWE in your application? Here are some quick paths forward:

🚀 Quick Start

Follow our Quickstart Guide for a step-by-step tutorial on implementing SIWE from scratch.

📚 Choose Your Library

We provide official libraries for multiple programming languages:

• TypeScript
• Rust
• Python
• Ruby
• Go
• Elixir

🪪 Ethereum Identity Kit component library and API

We offer the Ethereum Identity Kit component library and API to help you integrate SIWE and the rest of the Ethereum identity stack.

🔌 Pre-built Integrations

Get started quickly with existing integrations:

• NextAuth.js
• Auth0
• Discourse

Security First

SIWE prioritizes security through:

• Nonce-based replay protection to prevent message reuse attacks
• Domain binding to prevent cross-site message abuse
• Expiration timestamps for time-limited authentication
• Best practices guidance for secure implementation

Learn more about Security Best Practices.

Enterprise Ready

For enterprise applications, SIWE provides:

• OpenID Connect (OIDC) Provider for standards-compliant integration
• Scalable authentication supporting millions of users
• Compliance-friendly audit trails and security controls
• Professional support and deployment guidance

Learn more about OpenID Connect Integration.

Community & Support

SIWE is an open-source project with an active community:

• GitHub: Contribute to the project and report issues
• Twitter: Follow @signinethereum for updates
• Documentation: Comprehensive guides and references

Explore the Integrations section to see SIWE implementations in production.

Standards Compliance

SIWE fully complies with:

• EIP-4361: Sign in with Ethereum specification
• OpenID Connect 1.0 for enterprise integration
• OAuth 2.0 for authorization flows
• Web3 wallet standards for broad compatibility