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From the Schneier on Security blog

Locks that use Bluetooth Low Energy to authenticate keys are vulnerable to remote unlocking. The research focused on Teslas, but the exploit is generalizable.

In a video shared with Reuters, NCC Group researcher Sultan Qasim Khan was able to open and then drive a Tesla using a small relay device attached to a laptop which bridged a large gap between the Tesla and the Tesla owner’s phone.

“This proves that any product relying on a trusted BLE connection is vulnerable to attacks even from the other side of the world,” the UK-based firm said in a statement, referring to the Bluetooth Low Energy (BLE) protocol—technology used in millions of cars and smart locks which automatically open when in close proximity to an authorised device...