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Image Encryption Tool

Theory, Concept, and Logic

Pixel Manipulation

In digital images, each pixel represents a color, typically defined by its red, green, and blue (RGB) components. Pixel manipulation involves altering these values to modify the appearance of the image.

Swapping Pixels

  • Concept: Swapping pixels involves randomly exchanging the positions of pixels in the image.
  • Logic: This process scrambles the image, making it appear different without altering the pixel values themselves.
  • Implementation: Randomly swap pixel positions based on a cryptographic key.

Mathematical Operations on Pixels

Mathematical operations can be applied to the RGB values of pixels to further alter the image.

Addition and Subtraction

  • Concept: Addition and subtraction operations add or subtract a constant value from each RGB component of every pixel.
  • Logic: This shifts the color values, changing the overall appearance of the image.
  • Implementation: Add a key to each pixel’s RGB values during encryption and subtract it during decryption.

Encryption Process

  1. Load Image: Load the input image.
  2. Pixel Manipulation: Swap pixel positions and apply mathematical operations based on a cryptographic key.
  3. Save Encrypted Image: Save the modified image to a new file.

Decryption Process

  1. Load Encrypted Image: Load the previously encrypted image.
  2. Reverse Pixel Manipulation: Undo the pixel swaps and mathematical operations using the same cryptographic key.
  3. Save Decrypted Image: Save the restored image to a new file.