An overview of built-in security components is available in the HDP 2.1 Security Guide (excludes Argus, which is an add-on). There’s a timeline on the Hortonworks Security Labs page that indicates a future release may include “Encryption in HDFS, Hive & HBase”
Some third party add-ons that provide encryption for data at rest:
- Hadoop Security in the Enterprise – Zettaset
- Securing Data with DGSecure – Dataguise with HDP Sandbox
- Securing Enterprise Data in Hadoop – Voltage format-preserving encryption