Image Steganography with LSB algorithm

Program in C based on steganography to hide data in PNG images using the LSB Algorithm.

Compiling in C

$ gcc -Wall -o stega \
    main.c \
    steganography.c \
    steganography_util.c \
    3rdparty/lodepng/lodepng.c \

Makefile

There is a Makefile, its execution is optional. Automates the build and cleanup process

Building

$ make

or

$ make all

Clean

$ make clean

Usage

Usage: ./stega [required arguments]

Required arguments:
    -e      encode data with image
    -d      decode image and save data into a file

Encoding

Usage: ./stega -e input-image.png message.txt output-image.png

Encode a data file into a image

Decoding

Usage: ./stega -d input-image.png [-o output-text.txt]

Decode and extract data from an image

Optional arguments:
    -o specify the output file. [default: "message.txt"]

Example

Cover Image of 1300 x 731, 8-bit/color RGBA

Encoding

$ ./stega -e input_image.png secret_file.txt output_image.png

Stego Image

Decoding

$ ./stega -d output_image.png

Now open the generated text file to see the extracted data

License

MIT