Question 1

How to hide a file in an image using auyer/steganography?

Accepted Answer

Use the Encode function with a PNG image and your message bytes, as shown in the README example: open a PNG file, decode it, encode the message into a buffer, and save the output. Ensure error handling is added for production use.

Question 2

What image formats does auyer/steganography work with?

Accepted Answer

It only supports PNG images, as demonstrated by the use of png.Decode in the code snippets. For other formats, you'd need to convert them to PNG first, which isn't built into the library.

Question 3

Is auyer/steganography secure for hiding sensitive data?

Accepted Answer

No, it uses basic LSB steganography without encryption, making the hidden data vulnerable to detection by steganalysis tools. For secure hiding, you should combine it with encryption separately.

Question 4

auyer/steganography vs other Go steganography libraries?

Accepted Answer

This library focuses on simplicity and zero dependencies, but is limited to PNG and LSB. Other libraries might support more formats or advanced techniques, so compare based on your project's needs for flexibility and features.

Question 5

Can I use this with JPEG images?

Accepted Answer

Not directly—the library only handles PNG images. You would need to convert JPEGs to PNG externally before encoding, which adds complexity and might affect image quality or metadata.

Question 6

How to extract hidden data from an encoded image?

Accepted Answer

Use the Decode function after getting the message size with GetMessageSizeFromImage, as outlined in the README: open the encoded PNG, decode it, retrieve the size, and then decode the message bytes.

Question 7

What is the maximum file size I can hide in an image?

Accepted Answer

It depends on the image dimensions—calculate using GetMessageSizeFromImage, which returns the capacity in bytes. The README notes that each byte requires at least 3 pixels after the initial 24 pixels, so larger images hold more data.

steganography

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