title: Apache Solr and data encryption
body: <p>I currently use Solr 4.x and I'm involved in a project in which the data contains potential PII (personally identifiable information) aka sensitive data.  Was wondering if there is an effective and efficient way to protect this data within Apache Solr (encryption of full index, encryption of certain fields, etc.)? has anyone actually implemented this approach? if so, is the encryption approach still in use? <a href="https://stackoverflow.com/questions/5915265/hashing-a-solr-input-field">this post provides some input</a> but, doesn't seem like an efficient clear cut solution, mind you the post is dated early 2012. has there been any advances with a solution to this issue since?</p>