I am just trying to think the clue to convince the

I am just trying to think the clue to convince the judges SA has been infringing Strikeforce's patent.. The question which need be answered is how similar SA's specific approach to resolve the keylogger problem is to Strikeforce's specific approach, and how similar is allowed by patent law for a technology to a valid patent without being blamed for infringing? Has SA passed the red line of similarity?

If we can prove that SA already passed the bottom line, they broke the patent law.