The XeCureWeb Control plug-in is released for Safari and used by the KBStar bank in Koreea. Unfortunately, what you've heard might be a simple rumor as no one will give details about what's happening in a company. However, there isn't any information related to XecureWeb Control because it's a plug-in used by the employees and customers of the bank.
I recommend calling in order to find additional details about this: 82-2-6300-9999, Domestic 1599-4477