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The only way you can check that you definitely have the unlimited JCE installed is to download the JCE policy files for your version of Java from Sun and compare them with what you already have.
To enable JCE Unlimited, use the crypto. policy Security property introduced in JDK 8u151. DataStax recommends enabling Java Cryptography Extension (JCE) Unlimited to ensure support for all encryption algorithms, especially AES-256 for Kerberos and SSL when using Oracle Java.
Possible Duplicate:
Check for JCE Unlimited Strength Jurisdiction Policy files
I'm working on a project where I need to install the "Java Cryptography Extension" (JCE), which I think I've done. I followed the instructions here:
http://suhothayan.blogspot.com/2012/05/how-to-install-java-cryptography.html
Is there any way to verify that I've installed it correctly - some of the tests that I am running indicate that it's not.
Turns out my question is a duplicate of the following, and the accepted solution works perfectly:
Check for JCE Unlimited Strength Jurisdiction Policy files
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