I've worked in the payments industry as a system administrator for more than 15 years and spent much of my career working with Payment Card Industry compliance, which pertains to security requirements involving companies which handle credit card data.SEE: Password breach: Why pop culture and passwords don't mix (free PDF) (TechRepublic)PCI compliance is a very complex field with guidelines under which organizations in this industry are required to adhere in order to be permitted to handle payments processing.