The informer of the NSA (National Security Agency US), Eduard Snowden, has helped in the design of a housing for the iPhone 6 that detects whether the device is transmitting data when in Airplane mode.
The project was announced by the collaborator in design and American hacker Andrew "Bunnie" Huang, the founder of Bunnie Studios, known for being the first person to hack the Xbox.
Against the law: the fight against abuse of legal digital surveillance
The housing design is described in a document entitled "Against the Law: Countering Lawful Abuses of Digital Surveillance", where explains that this design seeks to protect journalists, activists and workers rights be tracked by the government.
The case features cable accessing the phone's antenna through the SIM slot to monitor the transmission of signals, while alarms and a screen cover inform users the status of their devices.
Why do I need to know that makes my device in airplane mode?
Snowden and Huang explained that use Airplane mode does not prevent the device emitting radio signals, so the jacket becomes necessary.
Exemplified by the iPhone from iOS 8.2, once you activate the Airplane mode GPS stays on - you can easily be traced, both for good and for bad Packages malware can activate radio signals our device, without consequences. graphics on the screen of our device. So we can not rely 100% software capabilities of our iPhone.
This document quoted the journalist Marie Colvin, who was tracked by the Assad regime in Syria and killed by cover stories about civilian casualties.
Where I can read the document Snowden and Huang?
In the following link you can read the entire document drafted by both, but eye, is in English.
PubPub.org | Document