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Deep Learning to Identify Keyboard Typing

Research has found that artificial intelligence (AI) has advanced enough to recognize information and passwords entered into computers by listening to keyboard typing sounds recorded on the video software Zoom and other recording devices.

The Daily Mail and others reported that this research team from three universities in the UK used a deep learning model to record keyboard typing sounds to identify the information entered into the computer. The results showed that the accuracy of identification using iPhone recordings was 95%. The recording accuracy using Zoom video software is 93%.

The researchers trained the artificial intelligence model on the sound of pressing 36 keys on a MacBook Pro, each key was pressed 25 times with different fingers or pressure, and the model was then able to correctly identify the pattern of each key.

To prove their theory, they placed an iPhone about 17 centimeters next to a MacBook Pro to record the sound of typing on the MacBook Pro keyboard, with an accuracy of 95%.

[Related articles] Google urgently warns not to open Gmail "this letter" and reveals hackers' new tactics to steal bank passwords (click on the image to enlarge and read):

The researchers tested Zoom and Skype in the same way. They collected the keystroke data of the target object through remote meetings, and then used these data to train the model. The accuracy rate of recording through Zoom reached 93%. Skype also has 91.7%.

Ehsan Toreini, a doctoral student at the Center for Cyber ​​Security at the University of Surrey in the UK, pointed out that each key has a unique audio or sound, and the key pressed can be inferred through voiceprint recognition.

Torini suggested that Apple should consider adding random noise to keyboards to prevent side-channel attacks, and that software such as Zoom should compress audio.

Extended reading: Can hackers hack into a computer with "no Internet access, no Bluetooth, and no USB"? You can rely on it to "fetch data from across the air" (click on the image to enlarge and read):

The researchers said that this type of side-channel attack is mainly to obtain the password entered by the victim, and it is not difficult to crack it. As long as the typing style is changed, the accuracy of the model will be reduced.

It is also difficult for users who can type without looking at the keyboard. Another defense method is to use random passwords.

Further reading:

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She cooks a banquet for her ex-husband's family, and the result is "3 deaths and 1 life in danger". She is suspected of eating the world's most poisonous "death cap mushroom"

[This article is reprinted with permission from "United News Network". 】

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