54 lines
2.2 KiB
HTML
Executable File
54 lines
2.2 KiB
HTML
Executable File
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<link rel="icon" href="data:image/svg+xml,<svg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 100 100%22><text y=%22.9em%22 font-size=%2290%22>❄️</text></svg>">
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<link rel="stylesheet" href="theme.css">
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<title>Snow10 - text steganography</title>
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<script src="main.js" defer></script>
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</head>
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<body>
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<div class="container main">
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<h1>Snow10 ☃</h1>
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<p>Snow10 is a simple web app for converting text to zero width unicode characters, which can be hidden in normal messages.</p>
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<p>It is inspired by the <a href="https://web.archive.org/web/20210117115615/http://darkside.com.au/snow/">original program</a> published in ~1998.</p>
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<p>Do not use alongside languages/emoji that use zero-width characters. Sorry, it's the way it works.</p>
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<pre>
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Threat model: person visually looking at message threads in an app such as Twitter, Matrix, Signal, documents, etc. E.g. abusive family
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This is steganography, not cryptography.
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Encrypt the secret message using something like pgp or age before using if encryption is needed.
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Will not resist forensic analysis. Don't use it over SMS.
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Privacy: This works client-side and does not log any messages.
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</pre>
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<label>
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<input type="checkbox" name="hideMode" checked>
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Hide mode
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</label>
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<form class="encode">
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<label for="hideText" name="hideTextZone">Non-secret message (secret gets hidden inside): <input type="text" name="hideText" placeholder="Wonderful weather we're having"></label>
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<br>
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<h1>Secret message</h1>
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<textarea name="inputSecret" placeholder="Secret to hide" required></textarea>
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<h1>Output</h1>
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<textarea name="output" readonly></textarea>
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<br>
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<button id="copyResult">Copy result to clipboard</button>
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<br>
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<input type="submit" value="Hide">
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</form>
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<form class="decode">
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<h1>Message containing secret</h1>
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<textarea name="inputSecret" placeholder="Non-secret message with secret inside" required></textarea>
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<h1>Output</h1>
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<textarea name="output" readonly></textarea>
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<input type="submit" value="Reveal Message">
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</form>
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</div>
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</body>
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</html> |