Satellites Are Leaking the World's Secrets: Calls, Texts, Military and Corporate Data

Researchers at UC San Diego and the University of Maryland have found that roughly half of geostationary satellite signals transmit sensitive data without encryption. The team spent three years using an $800 satellite receiver on a university rooftop in San Diego to intercept communications from satellites visible from their location. They collected phone calls and text messages from more than 2,700 T-Mobile users in just nine hours of recording.

The researchers also obtained data from airline passengers using in-flight Wi-Fi, communications from electric utilities and offshore oil and gas platforms, and US and Mexican military communications that revealed personnel locations and equipment details. The exposed data resulted from telecommunications companies using satellites to relay signals from remote cell towers to their core networks.

The researchers examined only about 15% of global satellite transponder communications and presented their findings at an Association for Computing Machinery conference in Taiwan this week. Most companies warned by the researchers have encrypted their satellite transmissions, but some US critical infrastructure owners have not yet added encryption.

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