When running Java source code to generate Token, if an exception "java.security.InvalidKeyException

Key Size" appears, how to handle it?

You can choose any of the following methods to handle it:

1. Upgrade Java to version 8u162 or above to use unlimited policy by default. If you upgrade to Java 9 or above, there are no related restrictions;

2. If your Java version is 8u151 or 8u152, please set unlimited permission policy directly in your program:

   Security.setProperty("crypto.policy", "unlimited");

   Security.setProperty("crypto.policy", "unlimited");

3. If your Java is another version, please download the JCE unlimited permission policy file from the official website and use the files in it to replace the corresponding jar in the $JAVA_HOME/lib/security directory:

   • If you have installed JDK7, please visit Java Cryptography Extension (JCE) Unlimited Strength Jurisdiction Policy Files 7 to download the file.

• If you have installed JDK8, please visit Java Cryptography Extension (JCE) Unlimited Strength Jurisdiction Policy Files 8 to download the file.