# US 2021/0345114 A1 · Vehicle-to-x communication apparatus and method for achieving a safety integrity level in vehicle-to-x communication > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0345114 A1 - Document ID: US20210345114A1 - Status: Published application - Kind: A1 - Application number: 17/270,563 - Filed: 2019-08-08 - Published: 2021-11-04 - Earliest claimed: 2018-09-06 - Assignees: Continental Teves AG & Co. oHG - Applicants: Continental Teves AG & Co. oHG - Inventors: Ulrich Stählin; Marc Menzel - Web page: https://patentgrep.com/patent/US20210345114A1 ## CPC - H04L 63/123: {received data contents, e.g. message integrity} - H04W 12/106: Packet or message integrity - H04W 4/12: Messaging; Mailboxes; Announcements - H04W 4/40: for vehicles, e.g. vehicle-to-pedestrians [V2P] - H04W 4/44: for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H] - H04W 12/03: Protecting confidentiality, e.g. by encryption - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A vehicle-to-X communication apparatus including: a reception device to receive a vehicle-to-X message; a first electronic computation device to calculate a hash value for a received vehicle-to-X message; and a second electronic computation device to generate a new vehicle-to-X message using data included in the received vehicle-to-X message and to calculate a hash value for the generated vehicle-to-X message. The first electronic computation device is designed in accordance with a higher safety integrity level than the second electronic computation device, and a comparison device to make a comparison between the hash value for the received vehicle-to-X message and the hash value for the generated vehicle-to-X message. The vehicle-to-X communication apparatus further processes the data from the received vehicle-to-X message depending on a result of the comparison. Also disclosed are a corresponding method and the use of the apparatus in a vehicle or an infrastructure device. ## Claims ### Claim 1 A vehicle-to-X communication apparatus comprising: a reception device designed to receive a vehicle-to-X message, a first electronic computation device designed to calculate a hash value for a received vehicle-to-X message, a second electronic computation device designed to generate a new vehicle-to-X message using data included in the received vehicle-to-X message and to calculate a hash value for the generated vehicle-to-X message, wherein the first electronic computation device is designed in accordance with a higher safety integrity level than the second electronic computation device, and a comparison device designed to make a comparison between the hash value for the received vehicle-to-X message and the hash value for the generated vehicle-to-X message, wherein the vehicle-to-X communication apparatus is designed to further process the data from the received vehicle-to-X message depending on a result of the comparison. ### Claim 2 (depends on 1) The vehicle-to-X communication apparatus according to claim 1, designed to further process the data if a result of the comparison indicates a match between the hash value for the received vehicle-to-X message and the hash value for the generated vehicle-to-X message. ### Claim 3 (depends on 1) The vehicle-to-X communication apparatus according to claim 1, wherein the first electronic computation device is designed in accordance with an ASIL B, C or D safety integrity level. ### Claim 4 (depends on 1) The vehicle-to-X communication apparatus according to claim 1, wherein the second electronic computation device is designed in accordance with an ASIL QM safety integrity level. ### Claim 5 (depends on 1) The vehicle-to-X communication apparatus according to claim 1, wherein the second electronic computation device is designed to carry out a vehicle-to-X communication protocol stack and to process the received vehicle-to-X message by means of the vehicle-to-X communication protocol stack. ### Claim 6 (depends on 5) The vehicle-to-X communication apparatus according to claim 5, wherein the vehicle-to-X communication protocol stack is designed in accordance with an ASIL QM safety integrity level. ### Claim 7 (depends on 5) The vehicle-to-X communication apparatus according to claim 5, wherein the second electronic computation device is designed to generate the generated vehicle-to-X message using the data from the received vehicle-to-X message by means of the vehicle-to-X communication protocol stack and/or a further vehicle-to-X communication protocol stack. ### Claim 8 (depends on 1) The vehicle-to-X communication apparatus according to claim 1, wherein the first electronic computation device is designed to store the hash value for the received vehicle-to-X in a data memory. ### Claim 9 (depends on 1) The vehicle-to-X communication apparatus according to claim 1, wherein the second electronic computation device is designed to store the data from the received vehicle-to-X message in a further data memory. ### Claim 10 (depends on 9) The vehicle-to-X communication apparatus according to claim 9, wherein the second electronic computation device is designed to store the data from the received vehicle-to-X message in a further data memory only if the result of the comparison indicates a match between the hash value for the received vehicle-to-X message and the hash value for the generated vehicle-to-X message. ### Claim 11 (depends on 9) The vehicle-to-X communication apparatus according to claim 9, wherein the further data memory is designed as a database for managing data of the vehicle-to-X communication. ### Claim 12 (depends on 1) The vehicle-to-X communication apparatus according to claim 1, wherein the vehicle-to-X communication apparatus is designed to make the comparison between the hash value for the received vehicle-to-X message and the hash value for the generated vehicle-to-X message by means of the first computation device and/or the second computation device. ### Claim 13 (depends on 1) The vehicle-to-X communication apparatus according to claim 1, wherein the second electronic computation device is designed to transmit the hash value for the generated vehicle-to-X message to the first electronic computation device in order to make the comparison. ### Claim 14 (depends on 1) The vehicle-to-X communication apparatus according to claim 1, wherein the first electronic computation device is designed to transmit the result of the comparison to the second electronic computation device. ### Claim 15 (depends on 1) The vehicle-to-X communication apparatus according to claim 1, wherein the first electronic computation device is designed to determine an identifier for describing a storage location for the hash value on the basis of the received vehicle-to-X message. ### Claim 16 (depends on 1) A vehicle or an infrastructure device comprising the vehicle-to-X communication apparatus according to claim 1. ### Claim 17 A method for achieving a safety integrity level in vehicle-to-X communication, comprising: receiving a vehicle-to-X message by a reception device, calculating a hash value for the received vehicle-to-X message by a first electronic computation device, generating a new vehicle-to-X message using data included in the received vehicle-to-X message, by a second electronic computation device, wherein the first electronic computation device is designed in accordance with a higher safety integrity level than the second electronic computation device, calculating a hash value for the generated vehicle-to-X message by the second electronic computation device, making a comparison between the hash value for the received vehicle-to-X message and the hash value for the generated vehicle-to-X message by a comparison device, and using the data from the received vehicle-to-X message for further processing, depending on a result of the comparison. ### Claim 18 (depends on 2) The vehicle-to-X communication apparatus according to claim 2, wherein the first electronic computation device is designed in accordance with an ASIL B, C or D safety integrity level. ### Claim 19 (depends on 6) The vehicle-to-X communication apparatus according to claim 6, wherein the second electronic computation device is designed to generate the generated vehicle-to-X message using the data from the received vehicle-to-X message by means of the vehicle-to-X communication protocol stack and/or a further vehicle-to-X communication protocol stack. ### Claim 20 (depends on 10) The vehicle-to-X communication apparatus according to claim 10, wherein the further data memory is designed as a database for managing data of the vehicle-to-X communication.