China’s Algorithms of Repression: Reverse Engineering a Xinjiang Police Mass Surveillance App

This report provides a detailed description and analysis of a mobile app that police and other officials use to communicate with the Integrated Joint Operations Platform (IJOP), one of the main systems Chinese authorities use for mass surveillance in Xinjiang. The findings provide an unprecedented window into how mass surveillance actually works in Xinjiang, because the IJOP system is central to a larger ecosystem of social monitoring and control in the region.