Harvard's Data Privacy Lab runs a simple "identifiability" web site. Submit your DOB, sex, and zip, and they'll tell you approximately how unique you are there

Harvard's Data Privacy Lab runs a simple "identifiability" web site. Submit your DOB, sex, and zip, and they'll tell you approximately how unique you are therein, based on Census data. http://aboutmyinfo.net/ http://aboutmyinfo.net/ Giving stores a false but consistent zip doesn't help, but using a new one every time might. Or, if we could all agree on a false zip to use, that would skew the data away from Census-based estimates. However, with DOB and gender data, it might just ID us uniquely within the adopted HN zip code.