The key concept is the collection and analyzing of huge quantity of information apparently unrelated. Images of a CCTV camera, some pictures on favorite social network, a series of post exchanged here and there on the web all those information gathered over the years and to refer to any kind of research. With the term of Mosaic theory we refer the method used in security analysis to gather information about a corporation. A natural extension of the method hit its application to apply to ordinary life. The technological evolution has endowed us with things that made it easy to implement a so futuristic and powerful theory.”]
Source: https://securityaffairs.co/wordpress/566/cyber-crime/from-the-mosaic-theory-to-the-stuxnet-case.html