Hackers have learned to hack computers high-frequency sound signals





Recent studies show that the use of microphones and speakers bundled any modern laptop and mobile devices, hackers can imperceptibly from you to send and receive data using high-frequency sound signals that are virtually inaudible to the human ear.

Michael and Michael Goetz Hanshpah, researchers from the German Institute for Communication, Information Processes and ergonomics Fraunhofer recently as part of a scientific experiment showed that the creation of a “hidden acoustic networks”, the information transmission system, the creation of which was considered impossible, in fact it is possible.

Details of this discovery were published in the Journal of Communications and can play a very important role in the knowledge of electronic security systems.

“If you have a high need for information security, you definitely need to know the countermeasures” – says Hanshpah.

The bottom line is that now you can even hack computers in the system of the air gap, that is, those machines that are not connected to the Internet.

“This is really breaking new technology,” – says a retired U.S. Navy Captain Mark Hagerott, professor of cybersecurity at the Naval Academy in Annapolis, USA.

“All this is a race between emerging technologies, and attacks lasted for a very long time. But now, when the cost of writing code has become very low, it is becoming more difficult to develop the necessary remedies “- continues Hagerott, did not participate in this study.

As part of their experiments, and Hanshpah Getz could transmit small packets of data between two laptops Lenovo, located in the air gap system (ie a closed internal network) to a distance of 20 meters. Moreover, when added to a closed network of other devices that can receive audio signals and transmit them to other nearby devices, the scientists were able to create a mesh network that can transmit data at a much more remote distances. Here it is important to point out that for these experiments, the researchers used ultrasound transmission and recording almost ultrasonic frequencies that people are not able to identify if it has the usual set of sound processors, speakers and microphone, that is, those things that are represented in all laptops on the market today.

Experiments were carried out with a variety of software, but it is best to show themselves a program designed for data transmission under water. Development of so-called adaptive communication system is engaged in research department of underwater acoustics and marine geophysics in Germany. It was the most successful of all the rest, but at the same time, it has one significant limitation: the ability to transmit a signal only at a very low rate of about 20 bits per second – that’s nothing compared to the rate offered by the standard of today’s networks.

However, despite the fact that it is not suitable for the transmission of video and other large files, it is enough to send and receive information about these or other button is pressed while entering the same password, or, for example, encrypted data and key about a particular user.

“If you have a very important files small size, there is a certain probability of theft” – suggests Hanshpah.

Low data rate is also suitable for activation through electronic signals malicious software preinstalled on your computer, such as USB-connected flash drive. According Hanshpaha, all this can cause a chain reaction and infect the entire private network.

Moreover, referring to the examples of history, scientists are confident that the development of this technology and the increase in its framework, the data rate – it’s a matter of time only.
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Tags: Hacking , Sound , Hackers .


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