Earlier this week a New York Times article claimed that NSA whistleblower Edward Snowden asked a group of lawyers visiting him to put their cell phones in the refrigerator—the idea being that it would act as a Faraday cage. But does it actually work?
In light of recent cellular privacy revelations, your most paranoid neurons might be firing hard. You can put a tinfoil hat on your head, but what about your gadgets? These Faraday Bags put your device in a radio-proof vault.
UK train operator C2C has taken the neat step of actually enforcing its "quiet zone" train carriages with a system than blocks cellphone signals. It's a technique borrowed from the defense industry where a transparent conductive film is placed over windows to stop electronic signals from sensitive equipment "leaking"…