Abstract: The present application discloses a method and a device for vehicle security communication, a vehicle multimedia system, and a vehicle. The vehicle includes an open system, a security chip and a closed system, the open system and the closed system are connected by the security chip, the method is applied to the security chip, and comprises: receiving a first control instruction from the open system, wherein the first control instruction includes encrypted control data; decrypting the encrypted control data in the first control instruction; obtaining the decrypted control data when the decryption is successful; and replacing the encrypted control data in the first control instruction with the decrypted control data to form a second control instruction, and transmitting the second control instruction to the closed system to make the closed system control the vehicle to perform a target operation according to the second control instruction.

Abstract: This application discloses a vehicle security communication method and apparatus, a vehicle multimedia system, and a vehicle. The vehicle includes an open system, a security chip and a closed system, the open system is connected to the closed system through the security chip, the method is applied to the security chip, and the method includes: receiving a first vehicle data instruction from the closed system, where the first vehicle data instruction includes original vehicle data; encrypting the original vehicle data to obtain corresponding encrypted vehicle data; and replacing the original vehicle data in the first vehicle data instruction with the encrypted vehicle data to form a second vehicle data instruction, and sending the second vehicle data instruction to the open system.