Cryptologists at Johns Hopkins University have found a way to crack the code stored in millions of car keys. The car security system sold by Texas Instruments involves a transponder chip embedded in the key and a reader inside the car. The transponder emits radio signals, which the receiver in the car has to identify. If there is a mismatch then the car will not start irrespective of whether the key is correct or not.

Cryptologists crack the car key code