What’s Fog Reveal? A authorized scholar explains the app some police forces are utilizing to trace folks and not using a warrant

Authorities businesses and personal safety firms within the U.S. have discovered an economical approach to interact in warrantless surveillance of people, teams and locations: a pay-for-access net device known as Fog Reveal.
The device allows legislation enforcement officers to see “patterns of life” – the place and when folks work and dwell, with whom they affiliate and what locations they go to. The device’s maker, Fog Information Science, claims to have billions of knowledge factors from over 250 million U.S. cellular units.
Fog Reveal got here to gentle when the Digital Frontier Basis (EFF), a nonprofit that advocates for on-line civil liberties, was investigating location information brokers and uncovered this system via a Freedom of Info Act request. EFF’s investigation discovered that Fog Reveal allows legislation enforcement and personal firms to determine and monitor folks and monitor particular locations and occasions, like rallies, protests, locations of worship and well being care clinics. The Related Press discovered that almost two dozen authorities businesses throughout the nation have contracted with Fog Information Science to make use of the device.
Authorities use of Fog Reveal highlights a problematic distinction between information privateness legislation and digital surveillance legislation within the U.S. It’s a distinction that creates a form of loophole, allowing monumental portions of non-public information to be collected, aggregated and utilized in methods that aren’t clear to most individuals. That distinction is much extra essential within the wake of the Supreme Court docket’s Dobbs v. Jackson Girls’s Well being Group resolution, which revoked the constitutional proper to an abortion. Dobbs places the privateness of reproductive well being info and associated information factors, together with related location information, in important jeopardy.
The trove of non-public information Fog Information Science is promoting, and authorities businesses are shopping for, exists as a result of ever-advancing applied sciences in good units acquire more and more huge quantities of intimate information. With out significant selection or management on the consumer’s half, good system and app makers acquire, use and promote that information. It’s a technological and authorized dilemma that threatens particular person privateness and liberty, and it’s a downside I’ve labored on for years as a practising lawyer, researcher and legislation professor.
Authorities surveillance
U.S. intelligence businesses have lengthy used expertise to have interaction in surveillance packages like PRISM, amassing information about people from tech firms like Google, notably since 9/11 – ostensibly for nationwide safety causes. These packages usually are approved by and topic to the Overseas Intelligence Surveillance Act and the Patriot Act. Whereas there’s crucial debate concerning the deserves and abuses of those legal guidelines and packages, they function below a modicum of court docket and congressional oversight.
Home legislation enforcement businesses additionally use expertise for surveillance, however typically with larger restrictions. The U.S. Supreme Court docket has dominated that the Structure’s Fourth Modification, which protects in opposition to unreasonable search and seizure, and federal digital surveillance legislation require home legislation enforcement businesses to acquire a warrant earlier than monitoring somebody’s location utilizing a GPS system or cell website location info.
Fog Reveal is one thing else totally. The device – made potential by good system expertise and that distinction between information privateness and digital surveillance legislation protections – permits home legislation enforcement and personal entities to purchase entry to compiled information about most U.S. cellphones, together with location information. It allows monitoring and monitoring of individuals on a large scale with out court docket oversight or public transparency. The corporate has made few public feedback, however particulars of its expertise have come out via the referenced EFF and AP investigations.
Fog Reveal’s information
Each smartphone has an promoting ID – a collection of numbers that uniquely identifies the system. Supposedly, promoting IDs are nameless and never linked on to the subscriber’s title. In actuality, that will not be the case.
Non-public firms and apps harness smartphones’ GPS capabilities, which give detailed location information, and promoting IDs, in order that wherever a smartphone goes and any time a consumer downloads an app or visits a web site, it creates a path. Fog Information Science says it obtains this “commercially obtainable information” from information brokers, allowing the device to comply with units via their promoting IDs. Whereas these numbers don’t comprise the title of the telephone’s consumer, they will simply be traced to properties and workplaces to assist police determine the consumer and set up pattern-of-life analyses.

Digital Frontier Basis, CC BY
Regulation enforcement use of Fog Reveal places a highlight on that loophole between U.S. information privateness legislation and digital surveillance legislation. The opening is so giant that – regardless of Supreme Court docket rulings requiring a warrant for legislation enforcement to make use of GPS and cell website information to trace individuals – it’s not clear whether or not legislation enforcement use of Fog Reveal is illegal.
Digital surveillance vs. information privateness
Digital surveillance legislation protections and information privateness imply two very various things within the U.S. There are sturdy federal digital surveillance legal guidelines governing home surveillance. The Digital Communications Privateness Act regulates when and the way home legislation enforcement and personal entities can “wiretap,” i.e., intercept an individual’s communications, or monitor an individual’s location.
Coupled with Fourth Modification protections, ECPA typically requires legislation enforcement businesses to get a warrant based mostly on possible trigger to intercept somebody’s communications or monitor somebody’s location utilizing GPS and cell website location info. Additionally, ECPA permits an officer to get a warrant solely when the officer is investigating sure crimes, so the legislation limits its personal authority to allow surveillance of solely critical crimes. Violation of ECPA is a criminal offense.
The overwhelming majority of states have legal guidelines that mirror ECPA, though some states, like Maryland, afford residents extra protections from undesirable surveillance.
The Fog Reveal device raises monumental privateness and civil liberties considerations, but what it’s promoting – the power to trace most individuals always – could also be permissible as a result of the U.S. lacks a complete federal information privateness legislation. ECPA permits interceptions and digital surveillance when an individual consents to that surveillance.
With little in the way in which of federal information privateness legal guidelines, as soon as somebody clicks “I agree” on a pop-up field, there are few limitations on personal entities’ assortment, use and aggregation of consumer information, together with location information. That is the loophole between information privateness and digital surveillance legislation protections, and it creates the framework that underpins the huge U.S. information sharing market.
The necessity for information privateness legislation
With out sturdy federal information privateness safeguards, good system producers, app makers and information brokers will proceed, unfettered, to make the most of good units’ subtle sensing applied sciences and GPS capabilities to gather and commercially mixture huge portions of intimate and revealing information. Because it stands, that information trove will not be protected against legislation enforcement businesses. However the permitted business use of promoting IDs to trace units and customers with out significant discover and consent may change if the American Information Privateness Safety Act, authorized by the U.S. Home of Representatives Committee on Power and Commerce by a vote of 53-2 on July 20, 2022, passes.
ADPPA’s future is unsure. The app business is strongly resisting any curtailment of its information assortment practices, and a few states are resisting ADPPA’s federal preemption provision, which may reduce the protections afforded through state information privateness legal guidelines. For instance, Nancy Pelosi, speaker of the U.S. Home of Representatives, has mentioned lawmakers might want to handle considerations from California that the invoice overrides the state’s stronger protections earlier than she’s going to name for a vote on ADPPA.
The stakes are excessive. Current legislation enforcement investigations spotlight the real-world penalties that stream from the dearth of strong information privateness safety. Given the Dobbs ruling, these conditions will proliferate absent congressional motion.