End-to-End Encryption (E2EE) for Direct Chats
End-to-End Encryption (E2EE) protects your personal conversations by ensuring that only you and the person you’re chatting with can read your messages. Not even Arattai can access them.
All your personal conversations and calls on Arattai are encrypted from the device before being sent to Arattai servers. This means only you and the person you are communicating with can read or listen to your messages and calls.
What’s Protected with End-to-End Encryption
Text messages, photos, videos, and documents shared in chats are all secured with end-to-end encryption. Voice messages, audio files, shared locations, and contact cards shared in chats are also fully protected. Voice and video calls, replies, forwards, quoted messages, file captions, and message descriptions all remain encrypted as well. Each message and call is secured with unique encryption keys that are stored only on your devices.
System information such as call and meeting notifications, sender user identifier, timestamp, and IP address is not end-to-end encrypted. Additionally, reactions and stickers are not end-to-end encrypted. However, your personal chats, calls, media, and shared information remain fully end-to-end encrypted, always.
Recognise New E2EE Chats
Older Non-E2EE Chats
Your older direct chats remain viewable and searchable, but you cannot send new messages in them. A fresh E2EE direct chat will be created automatically when you or the other user sends a new message.
Device and App Support
End-to-End Encryption for direct chats is supported on Android (version 1.33.6 or above), iOS (version 1.17.23 or above), and the Arattai Web and Desktop apps (version 1.0.7 or above).
If the other user is on an older version of the app, they must update to the latest version to support E2EE chats.
Encrypted Calls
All audio and video calls on Arattai are end-to-end encrypted.
Backups
Google Drive or iCloud backups are not supported for E2EE chats at the moment. Third-party cloud backups will be introduced in a future update.
Multi-Device Usage
End-to-End Encryption works across multiple devices. You can stay signed in on up to five devices at the same time. All your personal chats and calls remain end-to-end encrypted across these devices.
Signing Out of Arattai
Signing out deletes your encryption keys from the device. As the encryption keys are available only on the device, signing out clears all the secret keys. This means you lose access to all E2EE chat messages. Old encrypted messages cannot be recovered unless backups are introduced, which are currently under development.
Message Import
Importing messages into an E2EE chat is not currently supported. This feature will be added when backup and export features become available.
Message Privacy
Arattai or anyone else cannot read your encrypted messages. All encryption and decryption take place on your device, and Arattai servers cannot decrypt your messages, calls, or files.
The message encryption keys never leave your device. Only minimal metadata required for message delivery is visible to the server, such as sender and recipient IDs, timestamps, message type, and reactions. Message content, media, keys, and attachments remain fully encrypted and inaccessible.
Forward Secrecy
Arattai maintains forward secrecy by using a unique one-time encryption key for each message. Even if one key is compromised, all other messages remain protected.
Adding or Removing Devices
When you remove a device, it immediately stops receiving encrypted messages. Adding a new device generates fresh cryptographic keys so future E2EE messages can be decrypted securely. If a “key conflict” appears, Arattai automatically refreshes keys and re-establishes secure sessions.
Broadcast Messages
Broadcast messages are temporarily unavailable in the current version of Arattai. The broadcast system is being updated to work smoothly with end-to-end encryption. Support for broadcasts will be added shortly in an upcoming update. Your all new direct conversations are already protected with end-to-end encryption, and broadcasts will follow the same privacy standards when reintroduced.
Group Chat Encryption
Pocket Encryption
Security Audit and White Paper
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