RFID technology has already been criticized because its lack of encryption makes it easy for hackers to attack. Instead, it is sufficient for car thieves to extend the range of the signal between the key and the car. As long as there is gasoline in the tank, thieves can continue to drive virtually unhindered. A simple counter method is to manually switch off the virtual car key function, but this is not always possible. However, many suppliers of RFID technology are already retrofitting so that data security is also ensured with this method.

NFC security is generally stated to be high, for example, also for contactless payment. The reason for this is the encrypted transmission of the signals, which only takes place within a few centimeters. Car thieves would have to approach within this small distance to be able to use the data for themselves – similar to the attempt to read payment cards with a fictitious card reader. A dynamic, non-copyable code is generated for each NFC process. This further increases data security.

Bluetooth is also considered very secure when it comes to data transmission, provided that there is encryption of the sender and/or receiver. The data sent is then validated in a challenge-response process before the vehicle is opened. There is only a brief moment that would allow access from the outside – a hacking attack on the car in exactly this second is very unlikely.

And there is another option to increase security: If the Bluetooth module can be hidden among the available Bluetooth devices in the environment, it is only displayed in the selection of already authenticated smartphones. Possible attacks on the module can thus be prevented.