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Questions tagged [steganography]

Steganography is the study of hidden information in pictures, text, audio or video. It covers both methods of concealing information and methods of detecting hidden information.

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Steganography in lossy compression (JAVA)

I have this for encoding data in jpeg images in java. I am converting the text to its binary form and insert it to the LSB (depending on what the user has chosen.1,2,3,4) of the RGB in each pixel from (0,0) till (width,height). outer: for(int i…
user1730941
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How is steganography implemented in php

Somewhere I found out steganography .. the way of storing or hiding information within another information.. at times certain images are also used to hide the information.. Can i get an example or any thing further to know more about how this is…
Sachindra
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Steganography in Python - Stepic

Using Stepic 0.3. I am executing commands to encode a message into a JPG image. The code I use is the following: from PIL import Image import stepic im = Image.open ("tester.jpg") im2 = stepic.encode(im,…
user2436704
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Steganography in PDF files

Can somebody tell me, where is possible to hide some data into PDF file? In other words, steganography in PDF files. Is there any algorithm to do this?
user2144425
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Steganography in C

Trying to do basic Steganography on a PPM Image. I have the basic algorithm completed. Read in the file, check the header starts with P6, get the image width and height, and the pixel data. I need to have a total of four methods: ReadPPM, WritePPM,…
user1978536
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Can you hide data in text?

I wish to put some text on a page and hide some data in that text. Does anybody know of any methods / patterns that have been used in the past to solve this problem? Example: I have the following text: "The cat sat on the dog and was happy." I also…
Guy
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Hiding secrets inside photographs with php

I have created a service that hides text inside photographs. For example: $img_name = "myimage.jpeg"; $orig_contents = file_get_contents($img_name); $msg = "My secret."; $fp = fopen($img_name, "wb"); fwrite($fp, $orig_contents . $msg);…
hawkharris
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How can DWT be used in LSB substitution steganography

In steganography, the least significant bit (LSB) substitution method embeds the secret bits in the place of bits from the cover medium, for example, image pixels. In some methods, the Discrete Wavelet Transform (DWT) of the image is taken and the…
Reti43
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Combining semacodes and steganography?

Update I asked this question quite a while ago now, and I was curious if anything like this has been developed since I asked the question? I don't even know if there is a term for this kind of algorithm, and I guess there won't be if nobody has…
Bjarke Freund-Hansen
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block processing with multiple input matrices

I'm working in matlab processing images for steganography. In my work so far I have been working with block processing command blockproc to break the image up into blocks to work on it. I'm now looking to start working with two image, the secret and…
Michael Allen
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OpenCV extracting image using LSB method

Disclaimer: This was part of a homework assignment, however, it has been passed in already. I'm simply looking for the correct solution for future know-how. The goal with this program was to use the Python OpenCV library to implement image -> image…
P Gilson
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Image steganography that could survive jpeg compression

I am trying to implement a steganographic algorithm where hidden message could survive jpeg compression. The typical scenario is the following: Hide data in image Compress image using jpeg The hidden data is not destroyed by jpeg compressiona nd…
user1563721
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Will YouTube re-encode a file when uploading, which has the recommended video format (H.264)?

Will YouTube re-encode a video file, which will be uploaded with H.264 encoding? I'm currently working on a video steganography project. Will it be possible to upload to YouTube without any video re-encoding?
Risina
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what's the best practice for image steganography resistant to various attacks?

I'm really curious about that because nowadays every channel could modify or compress images some way which could be considered as a attack on steganography. We can divide steganography to two basic types, first operates on spatial domain of image…
user1563721
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GD imagejpeg() compression?

I'm working on a project where I edit the pixels of a jpg in PHP using the GD library. Its very crucial and key to my project that the output from PHP retains the pixel values I set (cough-steganography-cough). This is the first time I've attempted…
itsachen
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