Abstract: An onboard communication network of a vehicle is monitored to detect a plurality of available messages that include respective cipher-based message authentication codes (CMAC) and that were identified as eligible messages based on having an information entropy greater than a specified threshold. A first message is selected from the plurality of available messages. The CMAC of the selected message is input into a random number generator that outputs a random number seeded by the CMAC of the selected message. Then the random number is provided.
Type:
Grant
Filed:
March 17, 2021
Date of Patent:
October 17, 2023
Assignee:
Ford Global Technologies, LLC
Inventors:
Venkata Kishore Kajuluri, Xin Ye, Bradley Warren Smith, Jacob David Nelson