Customization of Security Level for a PDF Document.
If you are using a JDK prior to 1.4, you need to have
Java Cryptography Extension(JCE) 1.2.2 in your CLASSPATH.
To encrypt a JClass ServerReport document, an RC4 encryption provider must be installed.
The RC4 encryption algorithm, originally a trade secret owned by RSA Security Inc,
is now available in a number of open-source implementations.
A partial list of commercial and open-source providers can be found here.
Instructions on how to install and register an encryption provider can be found here.