End-to-End Encryption
Also known as: E2EE, E2E Encryption
A security method where only the communicating parties can read messages, with no access possible for service providers or intermediaries.
End-to-end encryption (E2EE) ensures that only the sender and intended recipient can read a message. Not even the service provider has access to the decrypted content.
How It Works
- Messages encrypted on the sender’s device
- Transmitted in encrypted form through servers
- Decrypted only on the recipient’s device
- Private keys never leave user devices
Applications
- Messaging: Signal, WhatsApp, iMessage
- Email: ProtonMail, Tutanota
- File storage: Tresorit, SpiderOak
- Video calls: Signal, Zoom (optional)
Why It Matters
E2EE protects against:
- Mass surveillance
- Data breaches exposing communications
- Insider threats at service providers
- Government overreach
Ongoing Debates
Law enforcement agencies argue E2EE enables criminal activity. Security experts counter that backdoors would compromise everyone’s security.