Conti Temic Microelectronic Gmbh

Wolfgang Schrempp

Wolfgang Schulter

Disclosed are an apparatus and a method for generating at least one data packet to be transmitted in a bus system of a motor vehicle, wherein before transmitting the at least one data packet comprising the message to be included in the data packet a bus subscriber transmitting the data packet uses a first encryption apparatus to generate a message authentication code that is likewise to be included in the data packet by using a first encryption method to generate an encrypted message code from the message with a first key, using a second encryption method to generate an encrypted count from a count by means of a second key, and using a logic operation to generate the message authentication code to be transmitted from the encrypted message code and from the encrypted count, and an apparatus and a method for authentication checking such data packets at the receiver.

Devices and methods for the generating and authentication of at least one data packet to be transmitted in a bus system (BU), in particular of a motor vehicle

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Immenstaad, Germany

Wolfgang Schrempp