sentences:  Mumble connects to a server via a TLS control channel, with the audio travelling via UDP encrypted with AES in OCB mode.As of 1.2.9 Mumble now prefers ECDHE + AES-GCM cipher suites if possible, providing Perfect Forward Secrecy.While password authentication for users is supported, since 1.2.0 it is typically eschewed in favor of strong authentication in the form of public key certificates.