A WIBU CodeMeter key is an essential piece of hardware that is used to store the license(s) for the software,
So, to be able to run MSD 6™, you need to have such a key, and the key should have an MSD 6™ license.
A WIBU CodeMeter key is capabale of storing licenses for more then one software package. It can even store licenses for software from different manufacturers. So you might already have a WIBU CodeMeter key that you can use to store the MSD 6™ license on.
Some manufacturers will call the WIBU CodeMeter Key differently, Martin Professional for instances calls them Martin One-Keys.
If you already have a WIBU CodeMeter key, then you don't need a buy a new one to store the MSD 6™ license, we can add the MSD 6™ license on the key via some e-mails.