RFID security


Can anyone please make some recommendations for a RFID brand / product to use that is very secure by design?

I want to use it to lock my car and house and don't want people to be able to clone the card / RFID tag if I carry it on me in public. Credit Card and RFID cloning systems are quite freely available to thieves, so it seems. This is quite a big problem in our country. Thieves in our country steal cars within seconds and can clone any new car's keyfobs very easily.

Any recommendations on this would be appreciated.