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index-keytap2-gui-tmpl.html
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index-keytap2-gui-tmpl.html
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<!doctype html>
<html lang="en-us">
<head>
<meta charset="utf-8">
<title>Keytap2</title>
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no"/>
<meta name="twitter:card" content="summary">
<meta name="twitter:title" content="Keytap2" />
<meta name="twitter:description" content="Acoustic keyboard eavesdropping based on language n-gram frequencies" />
<meta name="twitter:image" content="https://keytap2.ggerganov.com/keytap2.png" />
<link rel="apple-touch-icon" sizes="180x180" href="/apple-touch-icon.png">
<link rel="icon" type="image/png" sizes="32x32" href="/favicon-32x32.png">
<link rel="icon" type="image/png" sizes="16x16" href="/favicon-16x16.png">
<link rel="manifest" href="/site.webmanifest">
<meta name="msapplication-TileColor" content="#ffffff">
<meta name="msapplication-TileImage" content="/ms-icon-144x144.png">
<meta name="theme-color" content="#ffffff">
<link rel="stylesheet" href="style.css">
</head>
<body>
<div id="main-controls">
<div id="description">
<h2>Keytap2 - acoustic keyboard eavesdropping based on language n-gram frequencies</h2>
<span class="text-body">
This is a proof-of-concept of an attack for recovering the contents of an unknown text just by analyzing the audio from the keyboard strokes.<br>
<b>No prior training is required.</b>
<br><br>
This tool runs entirely in your browser. No data is sent or stored to a server.
<br><br>
Assumptions and requirements:
<ul>
<li>The text is in English</li>
<li>At least 100 characters of meaningful text are typed</li>
<li>Only letters ("a" - "z") and the "Space" keys are pressed (i.e. no Backspace, Shift, numbers, etc.)</li>
<li>Noisy mechanical keyboard</li>
<li>Microphone in the vicinity of the keyboard</li>
</ul>
<br>
Here is a video demonstrating this type of attack: <a class="nav-link2" href="https://youtu.be/jNtw17S6SR0">Demo (~5 min YouTube video)</a>
<br><br>
For training-based acoustic eavesdropping, make sure to checkout <a class="nav-link2" href="https://ggerganov.github.io/keytap">Keytap</a>
<br><br>
To run this program in the browser you will need support for pthreads with WebAssembly (i.e. Chrome or Firefox Nightly).<br>
To enable WebAssembly pthreads and SharedArrayBuffer support, check this <a class="nav-link2" href="https://github.com/kripken/emscripten/wiki/Pthreads-with-WebAssembly/">page</a>.<br>
<br>
Press the "Init" button to start:
</span>
<div align="center">
<button onClick="doInit()" id="butInit" style="width:60px;height:30px;" disabled>Init</button>
<br><br>
<div class="nav-link2" id="download-info">Downloading WASM module and n-gram stats. Please wait ...</div>
</div>
</div>
<canvas class="emscripten" id="canvas" oncontextmenu="event.preventDefault()" hidden></canvas>
</div>
<div id="footer" class="cell-version">
<span>
Build time: <span class="nav-link">@GIT_DATE@</span> |
Commit hash: <a class="nav-link" href="https://github.com/ggerganov/kbd-audio/commit/@GIT_SHA1@">@GIT_SHA1@</a> |
Commit subject: <span class="nav-link">@GIT_COMMIT_SUBJECT@</span> |
</span>
</div>
<div id="footer2" class="cell-about">
<a class="nav-link" href="https://github.com/ggerganov/kbd-audio"><span class="d-none d-sm-inline">View on GitHub </span>
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</a>
</div>
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}
if (isInitialized == false) return;
var w = window,
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e = d.documentElement,
g = d.getElementsByTagName('body')[0],
x = w.innerWidth || e.clientWidth || g.clientWidth,
y = w.innerHeight|| e.clientHeight|| g.clientHeight;
Module._set_window_size(0.99*x, y - 1.40*document.getElementById('footer').clientHeight);
}, 500);
function checkLoop() {
var outputId = Module._get_output_id();
if (outputId != oldOutputId) {
offerFileAsDownload('record.kbd', 'mime/type');
oldOutputId = outputId;
}
setTimeout(checkLoop, 100);
}
function onkeydown(event) {
if (event.keyCode >= 112 && event.keyCode <= 123) {
event.stopImmediatePropagation();
}
}
function init() {
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document.getElementById("download-info").innerHTML = "WASM module initialized!";
window.addEventListener('keydown', onkeydown, true);
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});
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dropHandler(event);
});
setTimeout(checkLoop, 100);
//window.requestAnimationFrame(renderFrame);
}
function doInit() {
let constraints = {
audio: {
sampleRate: 16000,
channelCount: 1,
echoCancellation: false,
autoGainControl: false,
noiseSuppression: false
}
};
let mediaInput = navigator.mediaDevices.getUserMedia( constraints );
if (isInitialized == false) {
Module._do_init();
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document.getElementById("description").hidden = true;
isInitialized = true;
}
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}
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// process all File objects
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ParseFile(f);
}
}
function ParseFile(file) {
console.log(
"<p>File information: <strong>" + file.name +
"</strong> type: <strong>" + file.type +
"</strong> size: <strong>" + file.size +
"</strong> bytes</p>"
);
var reader = new FileReader();
reader.onload = function(event) {
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var stream = FS.open("record.kbd", "w");
FS.write(stream, buf, 0, buf.length, 0);
FS.close(stream);
Module._do_reload();
}
reader.readAsArrayBuffer(file);
}
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document.body.appendChild(a);
a.click();
setTimeout(() => {
document.body.removeChild(a);
URL.revokeObjectURL(a.href);
}, 2000);
}
var Module = {
arguments: ["record.kbd", "./data"],
preRun: [(function() {
}) ],
postRun: [(function () {
init();
})
],
canvas: (function() {
var canvas = document.getElementById('canvas');
//canvas.style.marginLeft = "-230px";
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})(),
print: (function() {
return function(text) {
text = Array.prototype.slice.call(arguments).join(' ');
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setStatus: function(text) {
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},
monitorRunDependencies: function(left) {
}
};
window.onerror = function() {
document.getElementById("download-info").innerHTML = "Failed to initialize the WASM module. Your browser might not be supported.";
document.getElementById('download-info').style.color='red';
console.log("onerror: " + event);
};
</script>
<script async type="text/javascript" src="@TARGET@.js"></script>
</body>
</html>