clickprint
n.— «Almost certainly—and if you’re wondering what a clickprint is, it is “a unique pattern of web surfing behavior based on actions such as the number of pages viewed per session, the number of minutes spent on each page, the time or day of the week the page is visited, and so on.” That’s the description used by Professor Balaji Padmanabhan, at the Wharton School at the University of Pennsylvania, and Professor Catherine Yang, of the Graduate School of Management at the University of California, Davis.» —“Is it possible to be identified by your ‘clickprint’?” by Charles Arthur Guardian (United Kingdom) Sept. 28, 2006. (source: Double-Tongued Dictionary)
Like a thumbprint.