mar2dina
Posts: 2
Joined: Sun Nov 25, 2018 1:42 pm
Occupation: Parent

Hacking the Air Gap: Stealing Data from a Computer that isn't Connected to the Internet

Postby mar2dina » Sun Nov 25, 2018 3:16 pm

Hi,
I need help understanding how to receive a binary signal from just changing the physical quantities of a computer. I also need help understanding how to convert the google science journal graph to a binary signal.
Thank you,
mar2dina

(For the record: I am using the google science journal to collect the data from my Chromebook. I am only measuring the light, ultrasound, and vibration quantities of my Chromebook so it won't get damaged. For light, I am using the brightness/dimmer buttons on the Chromebook. For ultrasound, I am using a website called https://typatone.com and this is my example https://typatone.com/m/5rxwTtOGHj. Finally, for vibration, I am using the clicking of the keyboard.)

LeungWilley
Expert
Posts: 329
Joined: Mon Jan 12, 2009 11:15 pm
Occupation: Electrical Engineer

Re: Hacking the Air Gap: Stealing Data from a Computer that isn't Connected to the Internet

Postby LeungWilley » Thu Nov 29, 2018 7:41 pm

Hi mar2dina,
Using the example of the light level (screen brightness), a binary signal may be defined as follows:
- 1 if screen brightness recorded is greater than X lux
- 0 is less than X lux

Using this, you can generate messages using "binary (1 and 0s)"
Hope this makes sense, please post again if you have any other questions.
Good Luck!
Willey


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