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Elasticsearch does not support encryption at rest at the application level. The recommended way to achieve it is by using the dm-crypt tool. This encrypts the volume at the OS level and is transparent to Elasticsearch. As this is an external tool, it is as far as I know not covered by the Elastic documentation, so you should seek out the appropriate Linux documentation instead.
In the link https://www.elastic.co/subscriptions they have mentioned they will support encryption at rest. So i thought there will documentation from elastic.
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