WhatsApp uses end-to-end encryption (E2EE) to secure messages and calls between users, ensuring that only the sender and recipient can read or listen to the content. This encryption means that no one else, including WhatsApp itself, can access the messages or calls
Key Features of WhatsApp End-to-End Encryption
- Automatic Encryption: Encryption is enabled by default for all personal messages and calls, requiring no manual activation by users
- Signal Protocol: WhatsApp’s encryption is based on the Signal Protocol, developed by Open Whisper Systems. It uses strong cryptographic algorithms like Curve25519, AES-256, and HMAC-SHA256 to protect data
- Unique Encryption Keys: Each conversation has its own unique encryption keys, so compromising one chat does not affect others
- Forward Secrecy: Encryption keys change with each message or call session, preventing decryption of past or future communications if a key is compromised
- Verification: Users can verify encryption by scanning QR codes or comparing 60-digit security codes with their contacts to ensure the chat is secure
End-to-End Encrypted Backups
WhatsApp also offers end-to-end encrypted backups for chat history stored on iCloud or Google Drive. These backups are protected by a password or a 64-digit encryption key that only the user controls. Without this password or key, WhatsApp cannot restore the backup or access its contents
How to Check Encryption on WhatsApp
Users can verify that a chat is end-to-end encrypted by opening a conversation, tapping the contact's profile, and selecting the "Encryption" option to view the security code
Summary
WhatsApp’s end-to-end encryption ensures that messages, calls, media, and backups are secured so that only the communicating parties can access them. This system protects against interception by third parties, including WhatsApp itself, making it one of the most secure messaging platforms available
