Be aware of exactly where your vulnerability to a breach can be found. Refine your strategy to secure your POS system and other potential entry points to your network. According to resources at Trustwave, the ROI for the purchase of malware by a hacker can be north of 1400%. If you leave a window open, they will find it.
For additional perspective from ISheriff, click here:http://www.fierceretail.com/retailit/story/48-retailers-have-been-breached-pos-weakest-link/2015-09-09