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In movies, always is so simple: screw up telephone handset, hide bug in it, screw in telephone handset – bugging is done. In reality, this is much more difficult, WissenVeronica Valeros and Sebastián García. Not only because no one is using more phones, which can be screwed up and back in a few seconds.
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The Beidenargentinischen hackers have tested bugs under everyday conditions. On 34. Chaos Communication Congress (34C3) in Leipzig, on Thursday, present your findings – undeveloped tool that allows you to scan a room for hidden bugs.
You have tried five Verschiedenebatteriebetriebene devices: Three microphones, a baby monitor and a GSM bug. They cost on Amazon, Ebayoder lesser known, Chinese websites between ten and 65Dollar and have names like ear-1 and MicroSpy. Most have specify from 500 to 800 meters, only GSM bug lets Sichpraktisch from anywhere in world, because it sends, as designation betrays, like a cell phone on EinerMobilfunkfrequenz.
Monitoring in real time is difficult
In DenExperimenten of Valeros and García one of m played victim, or denTäter. The victim entered a previously chosen space, also spoke previously agreed passwords and in doing so sought bug (s) that DerTäter had previously versteckthatte within a maximum of ten minutes in room – or even Not.
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The WichtigsteErkenntnis of Valeros and García is: wiretapping is verdammtschwierig, especially in real time. For one, GetestetenGeräte are between three and a half to eight centimeters long, dieFM microphones also have long antenna cables. Entsprechendsorgfältig, bugs need to be hidden. Valeros and Garcíawählten, for example, underside of a table top.
Bug under table: Experimenet by Veronica Valeros and Sebastián García © Veronika Valeros/Sebastián García
On or, ” microphones are super sensitive”, says García, “refore wirdjedes even tiny noise is extremely amplified. If victim is close to microphone, sometimes noise seinerBewegungens that offender misses important words. “
Eavesdropping attempts are quite promising, however, if offender Workon has post-processing of recording and a suitable for it. Then he can filter out noise. “Wirhaben found that not even music in room is enough to make words that are not spoken incomprehensible,” says García.
Commercial eavesdropping protection is expensive
Because he and seineKollegin assume that, for example, some activists are undJournalisten, but also top monitored in this way, y have also used ihreExperimente to develop a bug-search device with Salamandra. There are companies that specialise in search for interception systems, eavesdropping protection of Deutsche Telekom, for example, sends four to five technicians with a minimum of 300 kilograms of heavy equipment, and use is accordingly expensive. Salamandra, on or hand, is open source software that anyone can download and modify for free.
If you benutzenwill, you need a computer on which Salamandra and anor software are installed, as well as a defined radio (SDR) – a transmitting and receiving device, so that many functions are not NULL by hardware, but by program. Corresponding modules are already available for WenigeEuro to buy, Argentines have a small DVB-T Recieververwendet. It n runs through room to look for telltale rashes of electromagnetic radiation triggered by radio signals from microphones. The AUSWERTUNGERFOLGT on computer screen.
