Error: Failed to validate certificate. The application will not be executed.

I experienced  this problem while I was trying to connect to the administration interface of a Brocade FC Switch but the Java Applet did not start. This error message was shown: “Failed to validate certificate. The application will not be executed”

Solution:

Locate java.security file under the java installation path. Edit and comment out the following line.

# jdk.certpath.disabledAlgorithms=MD2, RSA keySize < 1024

Close and Re-open the browser it should work.

The applet should start now but for security reasons it is recommended to reverse this change if it is no longer needed.