It was surprising to learn the level of secrecy that law enforcement groups apply to cellphone tracking technology. "Cell site simulators" or "IMSI catchers" like the Stingray have been used by at least 75 agencies in 25 states according to the ACLU:

(Source)

Geofence warrants, or reverse location searching, can give authorities access to the location history of everyone near the vicinity of a protest or other event of interest. Through my research, I believe the resources on this site provide the knowledge necessary to further understand the magnitude of data leaked through cell phones and how to safeguard your digital identity during demonstrations.

This is of extreme relevance given the recent worlwide protests against police brutality. As more demonstrations take place with more participants, the likelihood of law enforcement misidentifying suspects also increases. The implications of heightened law enforcement surveillance are far reaching and involve many technologies outside of cell phones, from license plate scanners to facial recognition algorithms.

As protesters continue demonstrating, and as governing bodies escalate their responses, it is not unlikely we may see novel technologies used to counter civil disobedience, or to retaliate against protesters after the fact. This means we must remain vigilant about our digital presence and whether authorities are using these covert surveillance technologies ethically and legally.