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<p>On 3/11/25 07:31, Jerry Leichter wrote:</p>
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cite="mid:8C8DE080-4233-470C-ABCD-3BCB967A14E4@lrw.com">
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A new effort. Its description: “<span
style="font-size: 16px; caret-color: rgb(31, 35, 40); color: rgb(31, 35, 40); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji"; -webkit-text-size-adjust: 100%; background-color: rgb(255, 255, 255);">This
library allows you to communicate small amounts of data between
air-gapped devices using sound.”</span>
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<div>Just what we need. It’s not as if this hasn’t been done
before; but now it can become part of every attacker’s base
toolkit.</div>
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<div style="display: block;" class=""><a
href="https://github.com/ggerganov/ggwave"
moz-do-not-send="true" class="moz-txt-link-freetext">https://github.com/ggerganov/ggwave</a></div>
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<div dir="ltr"> --
Jerry</div>
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<p>Mmmmm....</p>
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<p>The old dialup telephone modems did the same thing, only a lot
better, because they stuffed the bits into 4kHz audio bandwidth;</p>
<p>current computer audio can do substantially better than 4kHz.<br>
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<p>These protocols are still being used -- e.g., ham radio,
broadcast radio (to display the the title of the current music
being played), etc.</p>
<p>You can even use touch-tones, if you're a 5th grader !</p>
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