Wrap Your Key Fob in Foil to Protect Against Thieves ?

A story in USA Today (July 8, 2018) suggests that you should store your automobile key-fob in a aluminum can at night, and wrap it in aluminum foil while you carry it around during the day. The idea being that this will prevent thieves from cloning your key fob and driving off with your vehicle. 

While it is theoretically possible for someone with the right technology to copy the code from a key fob and use it to access a vehicle; this theoretical attack requires detailed knowledge of the system implementation and a combination of data, skills, and equipment which is seldom feasible for the average car thief. A thief would not only have to capture your key fob code, but would then be required to spend time processing data to replicate your key fob and produce the correct entry code in order to steal your vehicle.

Warnings about thieves capturing or manipulating vehicle keyless entry systems have been around for years (since at least 2008), and are far more hype than fact. Yes, the attack is possible, but it is also unlikely. The average person has little to worry about when it comes to thieves cloning their key fob and stealing their car.

Still, if this is a concern for you, I believe that you will be far better served with a Faraday bag specifically designed to block signals, than trusting your security to a tin can and a sheet of aluminum foil.
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