Encrypted UDP (DTLS) in Akka

I need to create a server-clients application in Scala / Akka for realtime encrypted streaming. Since the loss of some packets does not matter, but speed (latency) is critical, UDP is much better than TCP.

As far as I know Akka / Scala / Java do not support DTLS. What would be the best infrastructure / library for encryption?

Also, I am still deciding between the various Akka libraries to build the application core. (Akka I / O, Akka Remoting, Spray, Akka Http, Akka Streams). Should we wait for a stable release of Akka threads?