Updating the Java JCE policy files
The IBM WebSphere Application Server (WAS) application stack ships its own IBM® JRE environment with strong but limited jurisdiction Java™ Cryptography Extension (JCE) policy files.
Only limited encryption key sizes (currently 512-bit for RSA encryption) can be used by the WAS server when the JCE policy files are not upgraded to unrestricted policies. If the JCE policy files are updated, make a backup of the original jar files in case this change needs to be reverted.
For further details about JCE policy files, see:
Select your Java version and search for IBM SDK Policy files.