Modern smart keys allow you to keep the key fob in your pocket or purse while you simply grab the handle and tug the door open ... a passive Bluetooth keyless entry system with his Android ...

[Yingtao Zeng], [Qing Yang], and [Jun Li], a.k.a. the [UnicornTeam], developed the cheapest way so far to hack a passive keyless entry system, as found on some cars: around $22 in parts ...

Keyless ignition systems come ... keyless ignition and entry are now widely available, they're still more of a convenience than a necessity like power windows and door locks.