rakhesh shows …

May 9, 2006

Gone in 60 seconds–the high-tech version

Filed under: Links — rakhesh @ 4:01 pm

First introduced in the 1980s, modern remote keyless entry systems use a circuit board, a coded Radio-Frequency Identification (RFID) technology chip, a battery, and a small antenna; the latter two designed so that the fob can broadcast to a car while it's still several feet away. The RFID chip in the key fob contains a select set of codes designed to work with a given car. These codes are rolling 40-bit strings, meaning that with each use, the code changes slightly, creating about 1 trillion possible combinations in total. When you push the unlock button, the keyfob sends a 40-bit code along with an instruction to unlock the car doors; if the synced-up car receiver gets the 40-bit code it is expecting, the car performs the instruction. If not, car does not respond. §


Leave a Comment »

No comments yet.

RSS feed for comments on this post. TrackBack URI

Leave a Reply

Please log in using one of these methods to post your comment:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

Create a free website or blog at WordPress.com.

%d bloggers like this: