Data encryption for storing HBase in the cloud

I am new to HBase and was assigned the task of moving our infrastructure to the cloud. Our HBase data contains some information about the customer and therefore needs to be encrypted while on holiday. I am already reading this: Transparent Data Encryption at Rest ( http://hbase.apache.org/book/ch08s03.html#hbase.encryption.server )

This looks like a good solution, except for the fact that we have to store the password as plain text on each node. Is there a way to avoid this? How to store the password in only one place and source it for each node or something similar?

thank