Key fobs of luxury cars and models built within the last five years, however, tend to have sophisticated rolling-code encryptions. This means they'll require professional equipment for programming ...

Once you have manufacturers code, 64 bit key can be derived from plaintext serial ( sent over the air). Report ... users have been programming their own key fobs since cars had the freaking things.

Of course, programming a key fob won't take all day — but it's not a quick fix either. The time required to reprogram these devices depends heavily on factors like the vehicle's make and model ...