US 11,743,033 B2
Transmission of authentication keys
Venkata Kishore Kajuluri, Southgate, MI (US); Xin Ye, Farmington Hills, MI (US); and Bradley Warren Smith, Ann Arbor, MI (US)
Assigned to Ford Global Technologies, LLC, Dearborn, MI (US)
Filed by Ford Global Technologies, LLC, Dearborn, MI (US)
Filed on Feb. 9, 2021, as Appl. No. 17/171,388.
Prior Publication US 2022/0255729 A1, Aug. 11, 2022
Int. Cl. H04L 9/08 (2006.01)
CPC H04L 9/083 (2013.01) [H04L 9/0894 (2013.01); H04L 2209/84 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A system comprising:
a computer;
a first electronic control module; and
a wired vehicle communications network coupling the computer and the first electronic control module;
the computer being programmed to:
transmit authentication keys to the first electronic control module and a plurality of second electronic control modules via the wired vehicle communications network;
encrypt a table of the authentication keys using a first key;
store the encrypted table;
transmit the encrypted table to the first electronic control module via the wired vehicle communications network;
transmit the encrypted table and the first key to a remote server spaced from the wired vehicle communications network;
request a second encrypted table from the first electronic control module, the second encrypted table being encrypted using a second key, the computer lacking the second key;
transmit the second encrypted table to the remote server;
receive a third encrypted table from the remote server, the third encrypted table being the second encrypted table decrypted using the second key and encrypted using the first key; and
decrypt the third encrypted table using the first key.