3 ms·

I don't know how this particular radar system works, but in general you can modulate radar signals with a special encoding, so that only the sender can receive

I don't know how this particular radar system works, but in general you can modulate radar signals with a special encoding, so that only the sender can receive and interpret it. For all others the signal is juse noise. At university we worked with m-sequence based radar systems that have these properties. This would minimize the possibility that someone (accidently or not) can send signals that you misinterpret. Depending on the remaining possibility you might still want to take same countermeasures.

patcheudor 10y ago
I think this is where the industry really needs to start internalizing a few rules. As an example, never trust encoding alone to provide integrity for signals tied to life critical systems. This is more true than ever, especially since it's possible to buy software defined radio solutions which work in radar bands: http://ancortek.com/ http://ancortek.com/
shas3 10y ago
Yes, but if you flood it with white noise, it'd screw up any transmit waveforms. The only alternative is to have a software radio that is flexible enough to switch bands when it encounters noise.
- patcheudor 10y ago
  In terms of the SDR stuff, I'm thinking more about it being in the hands of a threat actor. One of the things that Tesla nor Google have had to contend with to date in their trials are intentional disruption and subversion of their systems and I only hope they've hired security engineers to consider more than just IT stack vulnerabilities like those explored by Charlie Miller & Chris Valasek (https://www.youtube.com/watch?v=OobLb1McxnI https://www.youtube.com/watch?v=OobLb1McxnI). A great number of jobs are at risk from this technology from long haul truck drivers to bus and cab drivers. This will certainly result in tensions which could result in threat actors going after sensing systems. Readily available radar frequency SDR in those conditions really could be used for harm.

patcheudor 10y ago

I think this is where the industry really needs to start internalizing a few rules. As an example, never trust encoding alone to provide integrity for signals tied to life critical systems. This is more true than ever, especially since it's possible to buy software defined radio solutions which work in radar bands: http://ancortek.com/ http://ancortek.com/

shas3 10y ago

Yes, but if you flood it with white noise, it'd screw up any transmit waveforms. The only alternative is to have a software radio that is flexible enough to switch bands when it encounters noise.

patcheudor 10y ago
In terms of the SDR stuff, I'm thinking more about it being in the hands of a threat actor. One of the things that Tesla nor Google have had to contend with to date in their trials are intentional disruption and subversion of their systems and I only hope they've hired security engineers to consider more than just IT stack vulnerabilities like those explored by Charlie Miller & Chris Valasek (https://www.youtube.com/watch?v=OobLb1McxnI https://www.youtube.com/watch?v=OobLb1McxnI). A great number of jobs are at risk from this technology from long haul truck drivers to bus and cab drivers. This will certainly result in tensions which could result in threat actors going after sensing systems. Readily available radar frequency SDR in those conditions really could be used for harm.