Mosaic theory of the Fourth Amendment

The mosaic theory is a legal doctrine in American courts for considering issues of information collection, government transparency, and search and seizure, especially in cases involving invasive or large-scale data collection by government entities. The theory takes its name from mosaic tile art: while an entire picture can be seen from a mosaic's tiles at a distance, no clear picture emerges from viewing a single tile in isolation.

Source: Wikipedia — Mosaic theory of the Fourth Amendment (CC BY-SA 4.0)