Enjoy watching this fancy smartphone car entry system fail utterly

"Unlocking your €100,000 car is now easier than ever," writes Álex Barredo.

Not to worry: I hear they're developing a durable, solid-state device that weighs only grams and comes with a custom encryption profile. It's called a "Serrated Analog Authentication Interlock Disengagement and Reengagement Shard" and they're working out the kinks.