Hi,

  I'm the main developer of Leshan Library. This is a Java open source implementation of LWM2M protocol hosted at Eclipse Foundation.
  We currently use Scandium (from Californium Project) as DTLS library.
  This library fits our needs until now but we have some concerns about future-proofness of it  (Especially, there is no plan for DTLS 1.3) and there is no support of TLS.

  So we explore some other way for the future.
  I had consider to use OpenJdk but there is a lot of missing IoT Features. I contact OpenJdk security dev and they makes me understand politely that IoT is not the priority (at least this is my understanding)

  Another solution we explore would be to use an mbedtls Java binding. (as mbedtls is well supported and focus IoT)
  There is a not official one at : https://github.com/open-coap/kotlin-mbedtls

   Questions  :

1. Is there any official java binding ? 
2. If no, is there any plan for that kind of binding ? 
3. If no, if there is a community initiative could it be hosted by you ? 

   Thx,

Simon