Signal-analysis is a side-channel attack that involves identifying information in electromagnetic signals emitted from a system.

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How can I know if any cell phones other than a given set are turned on in the nearby area?

I am searching for a solution to identify phones simply by the signals it emits. Imagine a signal receiver in a room, then I want to know which people are using phones nearby. I don't care what they ...
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Detect air signals

Is it at all possible to detect all air type signals for a given location? For example, if I wanted to get a list of all air signals (i.e. wifi, bluetooth, radio, 3g, 4g, and all other air type ...
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Is it possible detect a device using a 3G connection?

Someone has a hidden smartphone and are using the internet in a 3G connection. Can I find where is he? Maybe using a signal detector. find who is he? Maybe know the MAC number. just find if ...
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Electromagnetic induction attacks - reverse TEMPEST?

I know that electromagnetic emissions from a device can be used to extract information from a system, e.g. TEMPEST or Van Eck phreaking. I also know it's possible to induce a signal into a ...