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.
Questions tagged [steganography]
524 questions
3
votes
1 answer
python - Reading all kinds of files in different encodings
I built a Python steganographer that hides UTF-8 text in images and it works fine for it. I was wondering if I could encode complete files in images. For this, the program needs to read all kinds of files. The problem is that not all files are…
TheRandomGuy
- 337
- 5
- 20
3
votes
1 answer
Steganography Algorithm using Python PIL
I am trying to code basic steganography algorithms for B&W images using Python PIL.
Using an example image I can successfully extract the hidden image within it, and hide other images to subsequently extract them. The problem comes with hiding…
Gabriel Lefundes
- 325
- 1
- 13
3
votes
2 answers
steganography for audio watermarking
anyone can help me, I'm working on watermarking application for mp3 files with algorithms "echo data hiding". I do not understand to make this algorithm with java or matlab. I hope anyone can help by explaining this algorithm, or give examples with…
user494485
- 31
- 2
3
votes
1 answer
LSB-DCT based Image steganography
I'm working on LSB-DCT based Image steganography in which i have to apply LSB to DCT coefficients of the image for data embedding to JPEG.i'm new to all this.so searched and read some research papers they all lack a lot of information regarding the…
Sameer Azeem
- 548
- 2
- 9
- 22
3
votes
2 answers
Read bytes (chars) from buffer
I'm working on steganography program in Java. But I got advice that I be able to resolve this task better in C program. I would like to try it, but I'm pretty bad in C programing. For now I would like to read one gif file and find byte which is used…
Sk1X1
- 1,305
- 5
- 22
- 50
3
votes
0 answers
Robust invisible watermarking algorithm for embedding a sequence of numbers in a JPG image
I'm looking for a watermarking algorithm which is robust to scaling (up to 0.2 of the original image size), to cropping (at some extent) and JPEG compression. It should also be fast (at least the decoding phase) because I want the decoding done in…
Musti Rabin
- 183
- 1
- 9
3
votes
1 answer
Steganography in JPEG
I am working on a Java Steganography project to hide a .txt message in a JPEG image. Broadly speaking, there are 4 steps:
Transform each pixel block into 8x8 DCT coefficients.
Quantitize each block with some complex calculations.
Embed/replace each…
Douglas Grealis
- 599
- 2
- 11
- 25
3
votes
4 answers
Set Least Significant Bit in C
I write a simple steganography tool in C with bmp images.
I read the image to memory and the text to hide in char bytes[8] one character at a time.
so eg.
a=0d97
bytes[0] = 0
bytes[1] = 1
bytes[2] = 1
bytes[3] = 0
bytes[4] = 0
bytes[5] = 0
bytes[6]…
Angelos Mouzakitis
- 91
- 1
- 2
- 4
3
votes
1 answer
A code for step by step JPEG compression
The JPEG compression steps are as follows:
Raw image data -> forward DCT -> Quantization -> Entropy encoding -> JPEG image
There are numbers of converters and APIs out there and the converting process is a single API call. I was unable to find a…
Risina
- 234
- 3
- 16
3
votes
1 answer
Does there exist a digital image steganography algorithm which would be resistant to image manipulation?
I'm wondering - is there a steganography solution for digital images which is resistant to image manipulations? With "manipulations" I mean the most standard operations - recompressing JPEGs (or even changing file formats entirely), cropping and…
Vilx-
- 104,512
- 87
- 279
- 422
3
votes
2 answers
Hide email address from bots using pseudo elements?
Pseudo elements are not part of the DOM. They can't be targeted by javascript, and they are visible to the user.
If I wanted to implement a site with my email address (or any other information I did not want to be automatically scraped), but didn't…
Cris Stringfellow
- 3,714
- 26
- 48
3
votes
1 answer
Block steganography in PHP for an image host?
I am in the process of creating an image host, but want to avoid people embedding hidden images and files in the images they upload, as I cannot see the hidden images, therefore cannot monitor them.
I have heard of some people using steganography on…
ramo
- 945
- 4
- 12
- 20
2
votes
1 answer
Storing a Bitmap in Android
I am manipulating the values of pixels in a bitmap.
In a particular run of the program in Android
The source values of Red Green and Blue were 45 13 0
After manipulating the values the values were Red Green Blue 44 9 7
Now i create a new bitmap…
Desert Ice
- 4,461
- 5
- 31
- 58
2
votes
0 answers
Steganography with Microsoft Word - DOCX
I write a application hide a of string within a .docx file.
A Docx file comprises of a collection of XML files that are contained inside a ZIP archive. So, My program treat that file like a zip file and hide secret string in it.
After research, I…
Quynh Chi
- 99
- 6
2
votes
1 answer
Java - &0xff gives bits from 8 to 31 as 1's
I have a problem while doing the AND operator using 0xff.
public Pixel(int x, int y, int p) {
this.x = x;
this.y = y;
pixelValue = p;
A = (byte) ((p>>24) & 0xff);
R = (byte) ((p>>16) & 0xff);
R = (byte) (R&0xff);
G =…
iownt
- 33
- 4