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I was thinking of making an authentication protocol for canbus. Is there a way to send even 1bit privately to another node ? Have seen many implementations quite a few good ones. In particular ESA Academy states that they have a way to send a private bit within nodes. Do you think its possible ?

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    \$\begingroup\$ Depends on what you mean with "private". At the higher protocol layers, certainly... that's not really related to CAN. \$\endgroup\$ – Lundin Mar 30 at 14:34
  • \$\begingroup\$ What do you mean by that \$\endgroup\$ – Kylee Holcomb Mar 30 at 15:21
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    \$\begingroup\$ At the hardware level, there is no privacy - every node can see what is happening on the bus. To decouple what is happening on the bus from the actual bit you want to send/receive, you will need encryption, which requres a secret key shared between the sender and the receiver. \$\endgroup\$ – Wouter van Ooijen Mar 30 at 15:31
  • \$\begingroup\$ Agree on hardware level there is no privacy. As for secret key you mean that it will be defined ? Or how you think of that \$\endgroup\$ – Kylee Holcomb Mar 30 at 15:59
  • \$\begingroup\$ Just study encryption, this has nothing to do with electronics. \$\endgroup\$ – Lundin Mar 31 at 6:09

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