dataEncryption=true

Function

Specifies data encryption on disk for a new database. (For information about data encryption, see "Encrypting Databases on Disk" in the Derby Developer's Guide.)

Combining with other attributes

Must be combined with create=true and bootPassword=key. You have the option of also specifying encryptionProvider=providerName and encryptionAlgorithm=algorithm.

jdbc:derby:encryptedDB;create=true;dataEncryption=true;
    bootPassword=cLo4u922sc23aPe