Encrypted Messaging Apps Explained

Many messaging apps advertise encryption. The strongest form is called end-to-end encryption, and it changes who can read your messages.

What end-to-end encryption means

Your message is scrambled on your device and can be unscrambled only on the recipient's device. Even the company that runs the service, and anyone who intercepts the message on the way, sees only unreadable data.

The alternative

With ordinary encryption in transit, messages are protected while traveling but can be read by the service provider, which stores them on its servers.

What it does not protect

• Someone who has access to your unlocked phone.
• Screenshots and forwarded messages.
• Backups stored in the cloud without encryption.
• Metadata, such as who you contacted and when, depending on the app.

Features to look for

• End-to-end encryption on by default for all chats.
• Verification of contacts' security codes.
• Disappearing messages.
• Encrypted backups.
• Open-source code or independent audits.

Good habits

Use a screen lock, keep the app updated, check who is in group chats, and be careful with links from unknown contacts.

Encryption is a strong protection for private conversations, but it works best together with good security on your own device.