Is the kdb database encryptyed at some level? We have a security review regardin

I guess the data you are storing in a typical db like oracle or sql server, its the applicaton owner responsibilty to encrypt and decrypt. the kdb files are something that resides on the appian jboss servers and now one can access to look other than admins of the box.
The process variables data are not encrypted and could use some sort of algorithm not to have it directly understood when application admins monitor the process.
From my knowledge, Appian does not by default encrypt anything for you.
The .kdb files are kind of cryptic as you cant just open in notepad and read it.
Hope this helps to some extent.

K stores the data in it's own proprietary format that is not encrypted. Appian best practice recommends using disk-level encryption to protect the data stored.