A program that simulates the sound of a typewriter and other sounds when pressing keyboard keys.
This little utility makes the sound of a classic typewriter, short clicks and sound signals, every time you type or simply press a key on the keyboard.
The program is free, portable and easy to use. Once launched, simply set the audio volume using the slider and press the Set button.
Setting up ClicKey
It should be noted that ClicKey automatically assigns a sound to each key. There are 26 sounds in total. You can listen to them while typing something on the keyboard and choose the one most suitable for you. To install this sound on all keys, simply click on ClicKey.exe right click mouse, select "Send" and "Desktop (create shortcut)".
In the shortcut properties on the "Object" tab, after the file path you need to specify the parameters sound=(key (a-z) the sound you liked) and volume=(desired volume level from 1 to 100).
Example:C:\site\ClicKey.exe sound=d volume=89
After that, you can launch ClicKey using the shortcut and the parameters you need.
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Attackers can record acoustic signals during a Skype call, according to a new study by scientists from the University of California, Berkeley.
Previously, an attacker had to seriously prepare before an attack. In order to receive necessary information, the hacker had to be close to the target, know exactly the typing style on the keyboard and a lot of other information about the victim. Today, these conditions can hardly be considered realistic, and the result can hardly be considered effective. A University of California study examines new type attack, which was called Skype & Type. It can become a serious privacy issue.
When connecting to Skype, attackers can record the sound of keystrokes. By knowing certain features of a person's typing style, the researchers could determine with 91.7% accuracy which keys they pressed. The research team recorded sound using microphones, accelerometers, mobile devices and other sensors. After collecting the sound stream, the data was analyzed using supervised and unsupervised methods. machine learning. They ended up with a reconstruction of the user data. The researchers note that to carry out the attack, there is no need to install any malware on the potential victim's computer. You just need to listen to the sound of IP telephony systems.
"Skype is used by millions of people around the world," said Gene Tsudik, a professor in the department of computer science at UCI and one of the authors of the new study. “We showed that during a Skype call or video conference, your keystrokes can be recorded and analyzed by your interlocutors. They can learn what you enter, including passwords and other very personal things."
During a conversation on Skype, we do other things in parallel: send letters, chat messages, take notes. Pressing a key produces a sound that is transmitted to the other party. Many people use Skype and other VoIP applications to talk with loved ones, but very often the software is used for business meetings, and partners on the other side may not always be friends. If the attacker has an idea of what computer the victim is using, he will no longer encounter any obstacles on his way. You can build a profile of the acoustic radiation generated by each key on the keyboard. For example, the sound that "H" makes on MacBook Pro, differs from the same key on laptops from other manufacturers. In addition, "H" has a different sound from the "J" that is next to it.
Even without knowing anything about the keyboard or typing style, an attacker has a 42% chance of guessing which key a person is pressing. Touch screen keyboards are also vulnerable to Skype & Type. When a person types something on the keyboard during a VoIP call, be it a password or any other target text, the acoustic radiation from the keyboard is recorded by the microphone and transmitted to the hacker. All its actions can be divided into two phases - data processing and their classification. At the processing stage, data segmentation and feature extraction are performed. In the second phase, the attacker classifies the target devices and the main stages of the attack itself.
One potential use of the attack could be to record a password set on a hacker-proposed website or application. The researchers say their attack method could significantly reduce the amount of effort it takes for attackers to obtain user data. The attacker will not be disturbed by the victim's voice while typing the target text and weak throughput connections: Skype & Type is resistant to various VoIP problems, which confirms the feasibility of the attack.
A possible defense against a new type of attack could be the so-called ducking effect, which is widely used in the creation of electronic music. In this case, the user needs to reduce the microphone volume and cover the sound of keystrokes with some other sound. The problem with this method is that along with the volume of the audio signal from the keys, the sound of the voice is also muffled. “Effective countermeasures should be less intrusive and, if possible, only dampen the sound of the keys without interfering with the conversation,” the article states.
History of eavesdropping physical signals dates back to 1943, when it was discovered that an oscilloscope could extract plain text from the electromagnetic radiation of a Bell Telephone 131-B2, which was used by the US Army to encrypt communications. The common goal of all physical attacks is peripherals input devices such as keyboards and touch screens. Previously, hackers have already used electromagnetic and acoustic radiation from the keyboard, as well as videos of users typing on the keyboard or touch screen confidential data.
The issue of eavesdropping on user input on the keyboard is a fairly popular area of research. Research into acoustic keyboard signals dates back to when Dmitry Asonov and Rakesh Agrawal announced that telephone, computer, and ATM keyboards were susceptible to acoustic cryptanalysis. They showed that by teaching neural network on a particular keyboard, she had great success in eavesdropping on input on that same keyboard or keyboards of the same model. They also investigated why this was possible and found that the plate under the keyboard, where the sensors are located, behaves like a drum when a key is pressed. This feature allows you to distinguish the sounds of individual keys.
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