Open Two-Factor Authenticator

An open-source two-factor Time-based One-Time Password (TOTP) authenticator with SHA-256 secure storage

Open Two-Factor Authenticator aims to provide an open-source two-factor authentication to browsers and Android devices with synced storage. By using this extension, you can have your encrypted keys stored in the browser's synced storage. This allows you to sync them across multiple devices. This extension uses the public key/private key method to encrypt stored data (SHA-256). Currently, Open Two-Factor Authenticator supports Firefox on Desktop, Firefox on Android, Chrome, Edge, and Opera browsers. Standalone Android implantation is still in progress. Features: 1. Stores secrets securely using AES-CBC encryption. 2. Does not store passwords 3. Does not have any server-side activities whatsoever 4. Uses synced storage, so secrets are securely shared between multiple devices. 5. Supports custom number of digits and custom validation period