AirMessage was designed to be secure from day one.
Messages are always transmitted through secure tunnels while in transit, and AirMessage Server is designed to keep anyone who is not authorized out.
If you’re connecting directly to your server, AirMessage uses PBKDF2, which combines your server password along with a number of other random factors to keep your messages safe.
If you’re connecting using AirMessage Connect, all traffic is encrypted via TLS, which is the same technology used to secure account passwords and payment details on the internet.