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54 lines
1.3 KiB
Markdown
54 lines
1.3 KiB
Markdown
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---
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title: "Steghide: Steganography Quick Reference"
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date: 2026-03-22
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updated: 2026-03-22
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author: [The Tech Prepper]
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categories: [cryptography, reference]
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tags: [steghide, steganography]
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copyright: "(C) 2026 The Tech Prepper, LLC"
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---
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Steghide is a command-line tool used to embed and extract hidden data
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within image or audio files using steganography. This document provides
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an example using the JPEG image file format to hide and recover a
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hidden file with a secret message.
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## Extract Hidden Data from A JPEG Image
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Run the following command and use the password `beprepared` when prompted
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to extract the secret file from the image named `steghide.jpg` in this
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directory.
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```
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steghide extract -sf steghide.jpg
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```
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Run `cat secret.txt` to view the contents of the hidden file.
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## Embed Data in JPEG File
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Hide a file (i.e. secret.txt) inside a JPEG image. Replace IMAGE with
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your own JPEG image file. This will create a file named `output.jpg` with
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the file `secret.txt` hidden inside.
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```
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steghide embed -cf IMAGE -ef secret.txt -sf output.jpg
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```
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## Best Practices
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- Use large, high-quality cover files
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- Do NOT compressing images after embedding
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- Use strong passphrases
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## Common Workflow
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1. Prepare a secret file
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2. Select a large enough cover image to store your hidden file
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3. Embed using steghide
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4. Post or share the output image in plain sight
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