Why Signal?
Signal is recommended by security experts worldwide, including Edward Snowden. It provides end-to-end encryption by default with minimal metadata collection.
E2E Encryption
Signal Protocol, audited and proven
SecurityMinimal Metadata
Only stores phone number and last connection
PrivacyOpen Source
Fully auditable codebase
TransparencyNon-Profit
No ads, no tracking, funded by donations
TrustKey Features
- End-to-end encrypted messages, calls, and video
- Disappearing messages (auto-delete timer)
- Sealed sender (hides who sent message)
- Screen security (block screenshots)
- Registration lock (prevents SIM swap)
- Relay calls through Signal servers
- Note to self (encrypted notes)
Recommended Setup
Privacy Settings
- Enable Registration Lock (Settings > Account)
- Enable Screen Lock
- Enable Screen Security
- Disable Link Previews
- Set default disappearing message timer
- Relay calls to hide IP
Verification
Verify safety numbers with contacts in person to ensure no MITM attack:
verification
1. Open conversation
2. Tap contact name → View Safety Number
3. Compare numbers or scan QR in person
4. Mark as verified
Limitations
Phone Number Required
Registration requires a phone number (use secondary number for privacy)
Centralized
Relies on Signal's servers (single point of failure)
Device Security
Encryption doesn't help if device is compromised