What's important when selecting a WebAuthn server library?

Choosing the right WebAuthn server library is critical for seamless passkey integration. Here are the key considerations to guide your decision:

• Native Support: Select a library compatible with your backend's programming language and framework (e.g., SimpleWebAuthn for TypeScript, fido2-net-lib for .NET, or py_webauthn for Python).
• Community and Maintenance: Ensure the library has active community support and regular updates to stay aligned with the latest WebAuthn standards.

• Authenticator Options: Verify support for platform and roaming authenticators, including advanced capabilities like biometric verification and cloud sync.
• Attestation Formats: Ensure compatibility with various attestation types (e.g., none, direct, indirect) required for your use case.
• User Verification Policies: Look for flexible policies to manage user verification requirements, such as device PINs or biometrics.

• Comprehensive Documentation: Choose a library with clear, well-structured documentation and examples for faster implementation.
• Extensibility: Opt for a library that allows customization to fit your specific authentication workflows.

• Efficient Processing: Ensure the library handles cryptographic operations efficiently to minimize latency during authentication.
• Load Handling: Assess the library’s ability to handle high user traffic in large-scale deployments.

• Encryption Standards: Ensure secure handling of cryptographic keys and compliance with standards like FIDO2 and GDPR.
• Logging and Debugging: Look for libraries with built-in logging features for easier troubleshooting and audit readiness.

• Credential Storage: Verify support for your database system and check for schema recommendations or predefined models.
• Data Encoding: Ensure the library supports complex data encoding/decoding (e.g., Base64URL for public keys and credentials).

• Cross-Browser Testing: Choose a library tested across major browsers and platforms to ensure wide compatibility.
• Virtual Authenticators: Libraries with virtual authenticator support simplify automated testing in development environments.

By considering these factors, you can select a WebAuthn server library that meets your technical requirements, enhances performance, and ensures a smooth integration process.