We have released Search Guard 5.4.2-12 today, compatible with Elasticsearch 5.4.2.
You can install it like any other Elasticsearch plugin:
/bin/elasticsearch-plugin install -b com.floragunn:search-guard-5:5.4.2-12
Detailed installation instructions are provided in the official Search Guard documentation:
Thanks for your support and input!
Jochen and the Search Guard team
Search Guard (®) is an Elasticsearch plugin that offers encryption, authentication, and authorization.