The Eccirian Encrypt plugin adds file-level encryption and decryption to your vault, using AES-256-GCM and ECC-P-256 password-based encryption. It introduces a dedicated .eccirian file extension and replaces the editor view of locked files with a read-only message until the correct password is entered. Users can quickly toggle encryption via the command palette or UI controls, making it practical for managing sensitive notes without leaving the app. The plugin does not store passwords, so forgotten credentials mean permanent data loss.