![]() In most of the United States, police can get many kinds of cellphone data without obtaining a warrant. ![]() These towers record identifying information about cellphones connected to them which then can be used to track individuals. As mobile phone users move, their devices will connect to nearby cell towers in order to maintain a strong signal even while the phone is not actively in use. The device uses an IMSI-catcher and is claimed to be able to bypass cryptographic encryption by getting IMSI numbers and ESNs ( electronic serial numbers).Ī tower dump is the sharing of identifying information by a cell tower operator, which can be used to identify where a given individual was at a certain time. Dirtbox (DRT box) ĭirtbox (cell phone) is a technology similar to Stingrays that are usually mounted on aerial vehicles that can mimic cell sites and also jam signals. A typical cell tower mounted on electric lines. Įnd-to-end encryption such as Signal protects traffic against StingRay devices via cryptographic strategies. The Fremont Police Department's use of a StingRay device is in a partnership with the Oakland Police Department and Alameda County District Attorney's Office. Law enforcement agencies in Northern California that have purchased StingRay devices include the Oakland Police Department, San Francisco Police Department, Sacramento County Sheriff's Department, San Jose Police Department and Fremont Police Department. Their use entails the monitoring and collection of data from all mobile phones within a target area. StingRays are used by law enforcement agencies to track people's movements, and intercept and record conversations, names, phone numbers and text messages from mobile phones. This technology is a form of man-in-the-middle attack. This process is invisible to the end-user and allows the device operator full access to any communicated data. StingRay devices are a technology that mimics a cellphone tower, causing nearby cellphones to connect and pass data through them instead of legitimate towers. ![]() Mass cellphone surveillance Stingray devices It also encompasses the monitoring of people's movements, which can be tracked using mobile phone signals when phones are turned on. Interception of mobile phone activity Diagram showing the operation of a StingRay device for cellphone surveillance.Ĭellphone surveillance (also known as cellphone spying) may involve tracking, bugging, monitoring, eavesdropping, and recording conversations and text messages on mobile phones.
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