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For the RF geeks here - can't manufacturers implement some kind of anti-hijacking protocols into the RF I/O between the radio and the receiver? I understand it'
by rcurry 11y ago
For the RF geeks here - can't manufacturers implement some kind of anti-hijacking protocols into the RF I/O between the radio and the receiver? I understand it's hard to defeat jamming if the attacker has more power at hand than you do, but it seems like it would be easy to defeat devices that want to try and MITM or otherwise usurp the actual control commands.
- CraigJPerry 11y agoYeah they have for many years now, e.g. one of the more popular vendors is Futaba: http://www.futabarc.com/technology/fhss.html http://www.futabarc.com/technology/fhss.html But others use similar.
- erobbins 11y agofrequency hopping spread spectrum radios do have a pairing that results in the transmitter and receiver sharing a PRNG key, and switching frequencies at a high rate. They can still be jammed with broad spectrum high power transmissions, though.
- Ao7bei3s 11y agoThe hopping sequences are well-known, there is actually no PRNG involved. Of course, it'd work, assuming it was a cryptographically safe PRNG, and there was a safe key exchange. Real-world (hobby) RC transmitters/receivers used today do not have any security. At all. (The model bind feature available on most is a safety feature only.) (Also, there is no encryption and no authentication on any currently available (hobby) RC system I know of.
- dingaling 11y ago> The hopping sequences are well-known, there is actually no PRNG involved. For NATO kit it's actually the opposite; we know the frequency tables but not the switching sequence which is PRNG-generated.