While users generally do not like the idea of being tracked as they browse online, there are any number of legitimate reasons for tracking visitors to your Web site: Counting unique users, tracking browsing behavior, and even security.
Companies that are interested in monitoring the comings and goings of potentially bad actors can also benefit from better tracking techniques. At the Black Hat conference in Las Vegas, senior security consultant Gregory Fleischer of FishNet Security cataloged the ways that companies can fingerprint visitors' browsers and systems, track their visits and further unmask their identity.
