A Comparison of Image Steganography Techniques (LSB vs DCT)

This project was created for CIS*4110: Computer Security at the University of Guelph.

Requirements

The main requirements are: OpenCV & Pillow. Comparing the results requires matplotlib and other dependencies.

• openCV==3.0.0
• cycler==0.10.0
• decorator==4.0.11
• matplotlib==2.0.0
• networkx==1.11
• numpy==1.12.1
• olefile==0.44
• Pillow==4.1.0
• pyparsing==2.2.0
• python-dateutil==2.6.0
• pytz==2017.2
• PyWavelets==0.5.2
• scikit-image==0.13.0
• scipy==0.19.0
• six==1.10.0

Usage

Standard usage is:

stego.py [-h] [-d] [-a] -i FILE [-o FILE] [-s STRING] [-f FILE]

Stego: DCT and LSB Image Steganography

Optional arguments:
-h, --help  Show this help message and exit
-d          Set method to decode, default is encode
-a          Set encoding/decoding algorithm to LSB, default is DCT
-i FILE     Specify input file name
-o FILE     Specify output file name (optional)
-s STRING   Specify message to encrypt
-f FILE     Specify text file containing message

LSB encryption example:

stego.py -i inputFile.jpg -a -s 'message to encrypt'

DCT encryption example:

stego.py -i inputFile.jpg -s 'message to encrypt'

LSB decryption example:

stego.py -i inputFile.jpg -a -d

DCT decryption example:

stego.py -i inputFile.jpg -d