Cyber Patrol's earlier versions had list of blocked sites encrypted with fairly weak cipher. This of course meant that the site list was cracked pretty quickly.
Cyber Patrol 4 had "sophisticated anti-hacker security", which meant it had slightly better encryption, but that didn't stop Matthew Skala to break it (he did it mostly by analyzing the executables).
He made a document about break and his observations, and decided to put the document on web. Microsystems Software didn't exactly love the idea, and went for a law$uit.
Skala settled the matter by assigning the copyright of the documents to Microsystems. However, you can probably find a copy of the document anyway by searching for "cp4break" with the nearest web search engine...