公开(公告)号：US20220247567A1

公开(公告)日：2022-08-04

申请号：US17163602

申请日：2021-02-01

Applicant: Ford Global Technologies, LLC

Inventor： Xin Ye ,  Bradley Warren Smith ,  Venkata Kishore Kajuluri

IPC: H04L9/32 ,  H04L9/08 ,  H04L9/14

Abstract: A system includes a control module and a local server. The server is programmed to transmit a command to perform an operation to a plurality of vehicles including a vehicle including the control module. The command including a digital signature that is common across the vehicles. The control module is programmed to receive a temporary value; receive the command; decrypt the digital signature in the command with the temporary value; upon verifying the decrypted digital signature, perform the operation; and upon a metric incrementing to a threshold value, prevent decryption of the digital signature with the temporary value.

公开(公告)号：US20220224528A1

公开(公告)日：2022-07-14

申请号：US17149038

申请日：2021-01-14

Applicant: Ford Global Technologies, LLC

Inventor： Venkata Kishore Kajuluri ,  Xin Ye ,  Bradley Warren Smith

IPC: H04L9/08 ,  H04L9/32

Abstract: A computer includes a processor and a memory storing instructions executable by the processor to, upon receiving an authorization message, transmit a plurality of new authentication keys to a respective plurality of control modules, the memory including an expiration time for the authorization message; update a listing of the control modules with respective statuses of the transmissions of the respective new authentication keys to the respective control modules, wherein each status is one of successful or unsuccessful; upon at least one status being unsuccessful, prevent the authorization message from expiring at the expiration time; after preventing the authorization message from expiring, retransmit the respective new authentication keys to each control module for which the respective status is unsuccessful; and then expire the authorization message.

公开(公告)号：US20220006665A1

公开(公告)日：2022-01-06

申请号：US16918847

申请日：2020-07-01

Applicant: Ford Global Technologies, LLC

Inventor： Venkata Kishore Kajuluri ,  Xin Ye ,  Bradley Warren Smith

IPC: H04L12/40 ,  G06F9/4401

Abstract: Techniques for using a trip flag to detect desynchronization of trip counter values in a vehicle system. Techniques include a first electronic control unit (ECU) receiving a synchronization message including a trip counter and receiving a message from a second ECU including a trip flag. The trip flag includes a single bit of data generated by the second ECU. The first ECU compares the trip flag to a last bit of the trip counter stored at the first electronic control unit and processes the message in response to the trip flag matching the trip counter. The first ECU compares the trip counter to a previous trip counter based on the trip flag differing from the trip counter. The first ECU processes the message using the previous trip counter or increments the trip counter to process the message based on the comparison with the previous trip counter.