Whether you need to download JCE depends entirely on your Java version.
The is a framework that allows the Java platform to handle advanced encryption, key generation, and message authentication . Historically, because of U.S. export restrictions on "strong" cryptography, standard Java installations were limited to shorter key lengths (like AES-128). To use stronger encryption like AES-256, developers had to manually download and install "Unlimited Strength" policy files. Do You Need to Download JCE? java cryptography extension download