this post was submitted on 02 Jun 2025
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Raspberry Pi
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Could it only accept serialized messages? Once it’s received a message, never accept the same exact message again.
Well then you'd have to keep track of all messages recieved. An easier option might just be to sign the current system time, make sure the clocks are synchronized, and accept a +/- 1 second wiggle
Wouldn’t it just need to know which is the highest message number it has seen? And then don’t accept that one or any lower ever again?
If the count is within the encrypted message, no one can spoof anything higher.
I don't think this work's if you have multiple remote pilot tough...
Each remote could have an ID number it sends.