Patent ID: 10949552

Abstract:
An apparatus includes an authentication arrangement for a communication connection, using a communication protocol, between two data processing devices of the apparatus. The data processing devices each have an interface unit for the communication connection and a computation unit. The interface units each have an encryption/decryption device, where the encryption/decryption device is at least partially produced by hardware for encrypting at least some of the user data to be transmitted via the communication connection as part of the authentication arrangement. The encryption/decryption device can be applied in a communication layer of the communication protocol to the user data prepared for the physical user data transmission or to the physically received user data. Each data processing device has a security unit, implemented as dedicated hardware that the computation unit cannot access and/or in a manner logically isolated from the computation unit. The security unit produces a trusted execution environment, of the authentication arrangement with a hardware-encoded key information, on the basis of which the user data are encrypted by the encryption/decryption device.