Join Date: Mar 2005
Location: Palma de Mallorca
Thieves have been known to download a remotes code via a laptop and then open the vehicle without using any force.
Was your alarm disabled when you inserted the key ?.
"As these transmitters operate on a pattern of pulse modulation, millions of different pulse codes can be used, making individual systems unique, meaning other people can't gain access to your car without having a matching transmitter using the same pulse codes.
Even these systems are not foolproof because some criminals have devices called code-grabbers – these are basically radio receivers, which are sensitive to the transmitters signal and are able to receive the code and record it. If the thief can intercept your transmitted disarm code, he/she can then program another transmitter to exactly mimic your unique pulse coded signal. The thief can then completely bypass the alarm system next time you leave your car unattended.
To overcome this problem the more sophisticated car alarms generate a new series of codes every time you arm the alarm. The receiver then encrypts this new code and sends it to your new transmitter, allowing you to disarm the alarm when you return to your car. It doesn't matter if this new code is intercepted as it is only used once and is therefore worthless to any thief ".
Last edited by simoncharles; Feb 12th, 2008 at 9:23 am.