Messenger
Messaging Basics
Ghostline messenger uses:
- Signal Double Ratchet for 1:1
- Messaging Layer Security (MLS) for groups
- Stealth networking for metadata hiding
Messages are:
- End-to-end encrypted
- Forward-secret
- Synchronized privately
- Deleted by user control
Group Messaging (MLS)
Ghostline supports:
- Groups up to 2,000 users
- Fast membership changes
- Post-compromise security
- Multi-device membership
- Encrypted state consistency
MLS ensures that even large groups stay secure without sacrificing performance.
Verifying Contacts
Ghostline offers:
- Emoji Safety Numbers
- QR code verification
- Advanced cryptographic verification
- This ensures no one is performing a man-in-the-middle attack.
Disappearing Messages
Options:
- 1 hour
- 24 hours
- 7 days
- Custom expiration
Messages delete on all devices after expiration.
Private Contact Discovery
Ghostline uses Private Set Intersection (PSI):
- Your contacts stay on your device
- Ghostline server never sees your contact list
- Matches are calculated without revealing data
- No phone number needed
Relay Privacy (Tor/VPN)
Enable from 'Settings' → 'Privacy'.
Messages route through:
- Tor
- Dedicated VPN
- Randomized relays
- IP-blind routing
Ghostline cannot see your IP.