Internet browsing monitoring system

An Internet browsing monitoring system comprising:

• a web server configured to provide at least one web page in which at least some of the elements associated with the monitoring are encoded in the web page by a CSS code, the at least one web page comprising a detector detecting interactions to be logged, which mechanism is arranged, when a type of interaction to be logged is detected, to send the CSS code associated with the at least some of the elements with at least one indicator of the detected interaction to an interaction logging server;
• the interaction logging server comprising:
• an input memory configured to receive the CSS codes associated with a considered element and the at least one indicator of the detected interactions;
• and
• an extractor configured to analyze each CSS code associated with a considered element and the at least one indicator of the detected interaction, split them into chunks, encode at least some of the chunks in the form of a number, and store the resulting sequence of numbers encoding the chunks in a database;
• wherein the interaction logging server comprises a content delivery network server, and wherein the input memory is a logging memory of the content delivery network server;
• wherein the detection mechanism emits a content query to the content delivery network server, which content has a weight smaller than 1 kb, and wherein said content query contains, as parameters, at least the URL of the web page on which the interaction has been detected, the CSS code of the considered element and the indicator of the detected interaction.