Developed by MERCEDES BENZ for the first time 20 years ago, the SmartKey has been very convenient for motorists. However, since this technology has been applied so far, the smart key security has not been upgraded so that even if a simple wireless hacking device is purchased on the market, the password which is exchanged between the car and the smart key is wirelessly captured, the car door is opened, Things are happening in a random way. The biggest problem in smart key security so far is that the identification code exchanged between the smart key and the key is a fixed value and the security is difficult to hack the fixed single code value. However, if a mutual verification system, which is a security solution of BLACK LABEL, is applied to a smart key and a vehicle, it is impossible to access the vehicle even if the identification code value is fixed in a single code, Can be made. This is because the code that has been changed once and then discarded is discarded. ...