The PDA of tungsten

The great majority of the movable telephones that are sold nowadays incorporates connectivity bluetooth. And a great part of takes it to the users activated of continuous taking advantage of the capacity to detect near telephones, to use the free hands of the car (something that does not need that bluetooth is visible after to have registered the apparatus for the first time), or by simple ignorance. It is not necessary more to sit down in a cafeteria and to activate the detection of near apparatuses: they will appear tens and tens of them.

Detecting gadgets with bluetooth near

And she is that the functionality of the free hands and other accessories would not be decreased to have blueetooth activated but hidden, nevertheless to much it ignores it people and it continues being a traveling radio transmitter (and exposed to receive a virus by bluetooth).

Safe configuration of bluetooth, activated but invisible

Bluetooth would be interesting to take advantage of all this “noise” to analyze the people who happen around to ours, or of our house truth? This is what geek of Apeldoorn thought, in Holland, when seeing what could do with the adapter bluetooth USB that finished installing in its PC:

In September of 2007 I connected an adapter bluetooth USB with reach of 100 meters, and began to appear in my PC the names of telephones/near apparatuses with bluetooth. It was then when the idea was happened to me to mount a network of escáneres by my city to analyze people.

I placed adapters bluetooth in five sites with access to Internet: the houses of my friendly and relatives. In order to maintain the budget under I use Capios (Windows CE terminals). Reprogramé the Disk module on Chip so that Linux ran (in particular DSL) and my scripts. The picked up data are sent to a central data base (MySQL). The final result is what it is seen in these pages.

Scheme of the assembly

Thus it is, in Bluetoothtracking.org we can see the results of the carried out investigation. The number of equipment is impressive: it is enough to see the list of the last detected ones in the 24 hours nondetected previously. The results are very interesting, and abren to everything a field of techniques of study of the population:

• The traffic of people near buildings of offices, with a tip to 8, and another one to 12 Fridays (much people have afternoon of free Friday):

Equipment detected during the week near the offices

• The same but in center of the city, seeing itself the schedule in which department store abren:

Equipment detected during the week in center

• The distribution of models of GPS TomTom with bluetooth activated, detected in the cars that circulated near the sensors:

Models of detected navigator GPS TomTom

• The distribution of the Nokia models, a perfect study of the popularity of each of them:

Models of detected movable terminals Nokia

• Study of equipment detected in two locations located to 16 km of distance to each other, that detected a person who traveled between both, when appearing in both (it is possible to be known until how long took).

Trip interpreted from two consecutive sightings

As we see, the result stops being a curiosity, to have remarkable implications. We imagine the interest that this technique can have for the companies to the power to realise studies of commercialization and uses of its totally real products (this is not surveys, is data of all the population that happens through the sensors), or for the police, to the power to know when a telephone by the way passed site, that route followed, etc.

Nevertheless, we do not have to be alarmed in excess, since although direction MAC of the telephone identifies univocally to the apparatus (like it happens with the card of network of our PC), is not possible univocally to be related the telephone to the person. Somebody can be using rendered it, or it to have robbed. In addition a data base does not exist that relates directions MAC to the proprietor of the equipment (surely? inasmuch as time).

In the page of the project we can see that the author has taken the measures necessary to maintain the privacy of the detected people:

• Only are the 6 first digits of the MAC (the corresponding ones to the manufacturer, the other 6 digits yes that they univocally identify to the apparatus).
• The names of equipment that are combination of full name, directions of mail, telephone numbers, etc. have been eliminated.
• The most detailed data of the equipment have been eliminated.
• The option has been eliminated search

Of course, that this person has eliminated this information of her page, it does not mean that other that apply this same technique they are going to do it. It is more, crossing the data of this data base with which the operators own of their terminals, and the users of these terminals, the attack to our privacy that can suppose is really worrisome. So like conclusion, you do not put the power so easy to watch all your movements, and deactivate the visibility of bluetooth of your apparatuses, they are going to continue working equal but they will not be announcing that way your presence.

By: Tricks
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