Drill should support Kerberos based authentication from clients. This means that both the ODBC and JDBC drivers as well as the web/REST interfaces should support inbound Kerberos. For Web this would most likely be SPNEGO while for ODBC and JDBC this will be more generic Kerberos.
Since Hive and much of Hadoop supports Kerberos there is a potential for a lot of reuse of ideas if not implementation.
Note that this is related to but not the same as https://issues.apache.org/jira/browse/DRILL-3584