Delegation tokens play a critical part in Apache Hadoop security, and understanding their design and use is important for comprehending Hadoop’s security model.
Download our technical paper on adding security to Hadoop here.
Authentication in Apache Hadoop
Apache Hadoop provides strong authentication for HDFS data. All HDFS accesses must be authenticated:
1. Access from users logged in on cluster gateways
2. Access from any other service or daemon (e.g. HCatalog server)