JACKSONVILLE, Fla. -- 4 YOUR PROTECTION:

There's a new crime you need to know about -- crooks using your own key to steal your car, without it ever leaving your pocket or purse.

These radio frequency, or RF keys, allow a driver to open the door and start the car without ever using the key.

The scam involves crooks stealing that radio signal and using it against you.

All a criminal needs is a simple laptop computer to steal your signal. But there is a device that can protect you.

Marlon Holder, the creator of the Secure-I-Key, said, "The consumer needs to know how to protect themselves."

He said, "A signal is being sent out, out there, basically you need to know how to turn it off."

The Secure-I-Key is a pouch that blocks that radio frequency from transmitting, keeping it safe from criminals.

"You can walk around the mall, you can walk around the coffee shops, wherever you need to go," Holder said.

But not every car manufacturer with these RF keys thinks the pouch is necessary.

Arthur Smith with Tom Bush BMW in Jacksonville said, "It's some radio waves, it cannot be hacked, to the best of our knowledge. It's very secure."

Bush said their RF keys are not only secure, but provide an extra bit of security for the driver.

"Let's assume a lady is doing her Christmas shopping and she's being approached by unsavory characters," he said. "As she approaches her car, she merely reaches for the handle, opens it, she gets in her car, presses the button, drives off."

Holder created this pouch to help protect the customer. With high-tech crime on the rise, he said it's better to be on the safe side.

"In our world, it's better to have it and not need it than to need it and not have it," Holder said.

For more information: www.secureikey.com