The keychain-store library provides a secure, modern interface for Electron and Node.js applications to manage sensitive data using the macOS Data Protection Keychain and native code-signing entitlements.

Key Points

• Utilizes the modern macOS Data Protection Keychain (SecItem API) instead of legacy file-based storage.
• Supports biometric authentication, including Touch ID, and optional iCloud Keychain synchronization for stored items.
• Restricts data access to applications with specific code-signing entitlements and declared access groups.
• Handles both UTF-8 strings and binary data (Uint8Array) with explicit account management for mutable and immutable items.
• Includes a companion Swift library for native macOS development, ensuring cross-language compatibility for shared data.

Why it Matters

This library enables developers to implement robust, Apple-compliant security standards within cross-platform desktop applications without relying on deprecated or insecure legacy APIs. By leveraging native macOS access controls, it ensures that sensitive user credentials and tokens remain protected against unauthorized access while supporting modern features like biometric verification.