DragMath applet blocked by Java v7 update 51

[hashantha]

It appears that Java v7 update 51 introduced functionality that blocks Java applications using a self signed certificate.

https://www.java.com/en/download/faq/release_changes.xml

DragMath applet is blocked as a result of these changes.

[scyrma]

A reduced security workaround : http://stackoverflow.com/questions/21157450/how-to-make-a-machine-trust-a-self-signed-java-application

Moodle also has a bug about dragmath on https://tracker.moodle.org/browse/MDL-40568