Apparently the device costs just $30.00 and it will unlock just about any keyless entry car, says Road and Track magazine reporter Bob Sorokanich. Hacker's $30 Device Unlocks Just About Any Keyless Entry Car
What is a Faraday Cage?
"As TechInsider reports, Kamkar's latest toy takes advantage of a rather old vulnerability in car keyless entry systems. Most remotes use rolling codes to communicate with the car—meaning that the remote sends a different coded signal every time you push the button. This is meant to prevent bad guys from copying the remote's code to create a dummy remote. Most remote garage door openers operate on the same principle.
But there's a catch: Most automakers don't set an expiration date for the previously-used codes. While a single code can't be used twice, if a code never reaches the car in the first place, it's still valid.
That's where Kamkar's little device comes in. Named RollJam, the wallet-sized gizmo can be hidden on or underneath the target car. When the owner pushes the remote unlock button, the device detects the remote signal and jams it, preventing the car from hearing the signal. Since the car hasn't unlocked, the owner pushes the Unlock button a second time. The RollJam device records the second code, and sends the first code to the car. The car is unlocked, but the device has a stolen second code that never reached the car—one that can be used at a later date by the bad guys to unlock the car.
There is another story in Wired titled, Radio Attack Lets Hackers Steal 24 Different Car Models, where you can read the list of cars and models vulnerable to this type of hack. This article also has an illustration of the device and how it works."
For car owners who want to protect themselves against keyless-entry hacks, though, experts say there are precautions you can take.
"Stefan Savage, a University of California, San Diego computer science and engineering professor and a staffer at the Center for Automotive Embedded Systems Security, says that keeping your keys in a metal box, or carrying them in a wallet or purse designed to thwart hacks of passports with radio-frequency ID chips, could do the trick. Some key-holder products that claim to act as effective Faraday cages are the Fob Guard pouch and cases or wallets by Silent Pocket.
Bottom line is this; electronic key fobs are capable of being hacked by thieves who can then open your car doors at-will, when your car is publically available. They can even do this while the key fob is in your house and not in use.
Thieves are using signal amplifiers to take the faint whisper from the key fob in your house and amplify it to make it heard by your car as if it was right in their hands."
What is a FobGuard? You might want to know. $29.95, but then again there is a less expensive option.
Protect your car and its contents with this high quality "faraday cage" fob pouch - proudly made in the USA. Buy one for each of your key fobs.
This is mind boggling. Known in the industry as the proximity keyless entry exploit, aka Relay Hack.
So is it worth $29.95 to protect against this hack? Well, what if you could protect against the same hack for only a few dollars? How about $4.00?
Watch this video to learn how. Keep Hackers Out of Your Car With This Relay Hack Blocker