Door: Pedro G. C. Oliveira & Xuedi Chen.

“Scenario: Smartphone owners have become easy targets during protests. The government In Sochi collected information from activists and civilians near protests areas. The information collected through wifi antennas and scanners were later used by the state to track them down. There has also been talks about possible implementations of killswitchs that would allow cellphones to be turned off remotely by authorities.

This short-range personal jammer was created to block all outside communications to the phone while still allowing the user to access their camera and features without worrying about their personal information being collected and used against them.”

Aldus backlash.cc.