A keygen is a type of software crack that generates a product key or activation code for a software application, in this case, Serif DrawPlus X8. The keygen is used to bypass the software's activation process, allowing users to access the full features of the software without purchasing a legitimate license.

I'm assuming you're referring to Serif DrawPlus X8, a vector graphics editor, and its associated keygen (a type of software crack). Here's some information on the topic: