Hackers Can Clone Millions of Toyota, Hyundai, and Kia Keys - WIRED

Encryption flaws in a common anti-theft feature expose vehicles from major manufacturers.

chip-enabled mechanical keys

their technique likely isn’t as easy to pull off as the “relay” attacks that thieves have repeatedly used to steal luxury cars and SUVs. Those generally require only a pair of radio devices to extend the range of a key fob to open and start a victim’s car. You can pull them off from a fair distance, even through the walls of a building.

By contrast, the cloning attack the Birmingham and KU Leuven researchers developed requires that a thief scan a target key fob with an RFID reader from just an inch or two away