Epsilon, a company entrusted with large amounts of personal information on customers for all sorts of businesses was recently forced to notify large numbers of customers of a potential data breach. Best Buy, Marriott International and Scottrade are just a few of the big names who relied on Epsilon to store e-mail addresses, personal names, marital status and other personal information. While much of this information may be public in some form, the breach itself puts linked personal information in the hands of people who have ways of using it against you.