New certificate has been issued for the applets and the Java applications on this website. The certificate proves that the code was written by us and does not contain malicious code.

What do you need to do?
When you open the applet(s) a warning window pops up and asks you to confirm our identity as follows:



As you can see, the message says:
The application's digital signature has been verified. Do you want to run the application?
Check: Always trust content from this publisher
and then click on the button RUN.

That's all. Once you accepted the certificate you won't be annoyed by the warning window anymore.

Enjoy solving and creating!