I once worked for a company that ran into this same problem, hence, I have a whole lot of sympathy. However, I also sympathize with Symantec.
The biggest problem with the AV world is that it tends to be reactive. A criminal releases a piece of malware, it infects computers and then there is a fix released. The problem is that there is a gap between release and fix and criminals exploit this gap to steal information.
Reputation analysis is one possible solution. Alas, when it fails, it fails big (and hurts primarily independent developers).
The biggest problem with the AV world is that it tends to be reactive. A criminal releases a piece of malware, it infects computers and then there is a fix released. The problem is that there is a gap between release and fix and criminals exploit this gap to steal information.
Reputation analysis is one possible solution. Alas, when it fails, it fails big (and hurts primarily independent developers).