Especially large companies have already implemented systems able to track suspicious employee activities. When HR professionals learn how to use these systems, they will better understand the information flows within their company and anticipate problems more easily.
Remember that social networks have made mass sharing of information very easy. HR staff should thus be able to identify employees who have access to confidential information and carefully consider how to include the ban on sharing such information in their employment contracts.
Your IT department should have a real specialist able to deflect or, in the worse case, stop hacker attacks. Do not count on the fact that any "IT guy" can do this.
If someone steals confidential data about your company and employees from your systems, this data will most likely appear somewhere publicly. Your duty is to inform the affected employees immediately, offer support and follow your crisis procedures.
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Article source People Management - UK's leading human resources magazine