kubrick

a framework for medical steganography. supports least bit steganography. supports text, image, and binary file encoding/decoding.

installation

pip install -r requirements.txt

how to use

at the top of your main python file, import the lsbrick class from kubrick.py:

from kubrick import lsbrick

also, import the cv2 module:

import cv2

the lsbrick constructor is structured:

lsbrick([image read in using the cv2 module], [# representing the encoding length bit size])

example usage

text encoding/decoding

#encoding
steg_obj = lsbrick(cv2.imread("bryan_michael.png"), 16)
img_encoded = steg_obj.encode_text("hi how are you?")
cv2.imwrite("new_img.png", img_encoded)

#decoding
im = cv2.imread("new_img.png")
steg_obj2 = lsbrick(im, 16)
print(steg_obj2.decode_text())

binary file encoding/decoding

#encoding
steg = lsbrick(cv2.imread("bryan_michael.png"), 16)
data = open("my_data.bin", "rb").read()
new_img = steg.encode_binary(data)
cv2.imwrite("new_image.png", new_img)

#decoding
steg = lsbrick(cv2.imread("new_image.png"), 16)
binary = steg.decode_binary()
with open("recovered.bin", "wb") as f:
    f.write(data)

image file encoding/decoding

#encoding
steg = lsbrick(cv2.imread("chico.png"), 16)
new_im = steg.encode_image(cv2.imread("bryan_michael.png"))
cv2.imwrite("new_image.png", new_im)

#decoding
steg = lsbrick(cv2.imread("new_image.png"), 16)
orig_im = steg.decode_image()
cv2.imwrite("recovered.png", orig_im)

to test

write some tests (see "how to use" and "example usage" section) in test.py and run:

python test.py

notes

• only works with PNG files right now because JPEG/JPG files affect compression of bits

server

Run pip install -r requirements.txt Run python server.py

Create a folder called /uploads in the base directory, and include a default carrier image and name it carrier.png

The server runs on port 5000, and includes four endpoints (decoding and encoding for both image and text).

It expects image data packaged using the FormData API.