Security
CAN is a low-level protocol, and does not support any security features intrinsically. Applications are expected to deploy their own security mechanisms; e.g., to authenticate each other. Failure to do so may result in various sorts of attacks, if the opponent manages to insert messages on the bus. Password mechanisms exist for data transfer that can modify the control unit software, like software download or ignition key codes, but usually not for standard communication.
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Famous quotes containing the word security:
“To have in general but little feeling, seems to be the only security against feeling too much on any particular occasion.”
—George Eliot [Mary Ann (or Marian)
“It is hard for those who have never known persecution,
And who have never known a Christian,
To believe these tales of Christian persecution.
It is hard for those who live near a Bank
To doubt the security of their money.”
—T.S. (Thomas Stearns)
“The horror of class stratification, racism, and prejudice is that some people begin to believe that the security of their families and communities depends on the oppression of others, that for some to have good lives there must be others whose lives are truncated and brutal.”
—Dorothy Allison (b. 1949)