image-encryption

Encryption / decryption of images with AES in Python 3 (CBC and ECB mode supported)

Dependencies

• opencv (s. https://github.com/skvark/opencv-python)

• pycryptodome (s. https://www.pycryptodome.org/en/latest/)

• numpy (s. https://numpy.org/doc/)

Configuration

The following settings are possible in PyImgEnc.py:

• Set the mode in section ‘# Set mode’: AES.MODE_CBC or AES.MODE_ECB.

• Set the file path of the image to be encrypted in section ‘# Load original image’: If the image is in the same directory as PyImgEnc.py, only the filename is required, e.g. topsecret.jpg.

Image formats

• The images to be encrypted can be in one of the common formats (jpg, bmp, etc.).

• Encrypted images can also be saved. For this purpose a lossless format like bmp must be used.

Program execution and flow

• Start the program under Windows in the comand prompt with: py pyimgenc.py

• Once the program is started, the original image is displayed first. A click on any key displays the encrypted image. A further click displays the decrypted image. Another click deletes all images and exits the program.

Example

Original image

Encrypted image (CBC mode)

Encrypted image (ECB mode)

Decrypted image