Security
In April 2007, two Italian security researchers presented research about RDS-TMC at the CanSecWest security conference. The presentation, titled Unusual Car Navigation Tricks, raised the point that RDS-TMC is a wireless cleartext protocol and showed how to build a receiver and transmitter with cheap electronics, capable of injecting false and potentially dangerous messages.
Detailed instructions and schematics have also been posted in Issue No. 64 of the Phrack hacking magazine.
The TMC Forum responded by stating that the effects of any 'pirate' TMC broadcasts would be non-existent on users not on routes affected by any fake obstruction messages. Also, it was stated that such broadcasts would directly interfere with that country's TMC carrier station, which would contravene the respective laws of that county, leading to criminal or civil liability. They stated that it was therefore unlikely that such activity would take place.
Read more about this topic: Traffic Message Channel
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