A person's age can be determined by the history of surfing.

Researchers from the company Xerox found a way to quite accurately determine the age of a person without even asking him - just about the history of surfing. Such a method can be used in online authorization systems, in online stores, as well as everywhere where it is desirable to preserve the anonymity of the user and conduct verification quickly. This is a very urgent problem that has already been discussed at Habré .

A registered patent contains a detailed description of such a system that can determine the age, gender, and even the approximate level of income of the user. For this, user profiling and subsequent statistical comparison with a large database of behavioral patterns is used.

via New Scientist