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:
“The contention that a standing army and navy is the best security of peace is about as logical as the claim that the most peaceful citizen is he who goes about heavily armed. The experience of every-day life fully proves that the armed individual is invariably anxious to try his strength. The same is historically true of governments. Really peaceful countries do not waste life and energy in war preparations, with the result that peace is maintained.”
—Emma Goldman (1869–1940)
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—David Elkind (20th century)
“Happiness is peace after strife, the overcoming of difficulties, the feeling of security and well-being. The only really happy folk are married women and single men.”
—H.L. (Henry Lewis)