tutao/tutanota
Tutanota
Tutanota is an end-to-end encrypted email client and privacy-focused mail server. It functions as a cross-platform secure messaging application that provides encrypted email and calendar synchronization across desktop and mobile devices.
The system ensures that only the sender and recipient can read messages by implementing a zero-knowledge architecture, where the service provider cannot access user private keys or cleartext data. This is achieved through client-side encryption and the use of asymmetric key exchange to share encrypted messages without prior secret key exchange.
The platform provides secure email communication and private message archiving. It manages security through password-based key derivation, encrypted mailbox indexing to hide user activity from the server, and client-managed key storage for synchronizing private keys across devices.
Features
- End-to-End Encryption - Provides a complete email service where messages are end-to-end encrypted to protect user privacy from the provider.
- Mail Servers - Implements a privacy-focused mail server architecture that minimizes data collection and protects user identities.
- Client-Side Encryption - Performs all email encryption and decryption locally on the user device to ensure the server never sees plaintext.
- Encrypted Messaging Platforms - Offers a cross-platform application for end-to-end encrypted email and calendar synchronization.
- Encrypted Email Clients - Provides a dedicated client for sending and receiving end-to-end encrypted emails.
- Key Exchange Protocols - Implements public key cryptography to establish secure communication channels between users without prior secret sharing.
- Email Security - Ensures confidential email exchange over the internet protected from unauthorized third-party access.
- Key Derivation Functions - Uses slow hashing algorithms to derive the master encryption key from the user's password.
- Zero-Knowledge Suites - Employs a zero-knowledge architecture where the server stores only encrypted blobs and has no access to plaintext data.
- Encrypted Message Archiving - Stores electronic correspondence in an encrypted format to prevent data breaches from exposing personal history.
- Encrypted Indexing - Encrypts mailbox metadata and folder structures to prevent the service provider from analyzing user activity.
- Encryption Key Management - Provides secure synchronization and storage of private encryption keys across multiple user devices.
- Communication Apps - Encrypted email client for secure communication.
- Communication Tools - Encrypted email client focused on privacy.
- Email Clients - Encrypted email client focused on privacy.
- Email Services - Listed in the “Email Services” section of the Free For Dev awesome list.
- Calendars and Scheduling - Secure calendar integrated with encrypted email services.
- Email and Aliases - Encrypted email client with calendar integration.
