US 11,949,793 B2
Voltage encoded MAC and bus scrambling
Marcio Juliato, Portland, OR (US); Shabbir Ahmed, Beaverton, OR (US); Christopher Gutierrez, Hillsboro, OR (US); Xiruo Liu, Portland, OR (US); Manoj Sastry, Portland, OR (US); and Liuyang Yang, Portland, OR (US)
Assigned to Intel Corporation, Santa Clara, CA (US)
Filed by Intel Corporation, Santa Clara, CA (US)
Filed on Jul. 19, 2022, as Appl. No. 17/868,204.
Application 17/868,204 is a continuation of application No. 16/720,956, filed on Dec. 19, 2019, granted, now 11,463,262.
Prior Publication US 2022/0393878 A1, Dec. 8, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 9/32 (2006.01); H04L 12/40 (2006.01)
CPC H04L 9/3242 (2013.01) [H04L 12/40 (2013.01); H04L 2012/40215 (2013.01); H04L 2012/40273 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An apparatus for scrambling a message transmitted over an in-vehicle bus comprising:
memory, to store instructions; and
processing circuitry, coupled to the memory, operable to execute the instructions, that when executed, cause the apparatus to:
receive a control bit sequence for scrambling a message at a single transceiver, the control bit sequence including at least a control bit corresponding to a message bit of the message, wherein the control bit has a first bit value or a second bit value different from the first value;
determine whether the control bit has the first bit value or the second bit value;
transmit the message bit at a first voltage level when the control bit has the first bit value from the single transceiver, wherein the first voltage level is a normal or standard voltage level to transmit the message bit over a high Controller Area Network (CAN) line or a low CAN line of a CAN bus; and
transmit the message bit at a second voltage level different from the first voltage level when the control bit has the second bit value from the single transceiver, wherein the second voltage level is an inverted or flipped voltage level relative to the normal or standard voltage level to transmit the message bit.