Image encrypt/decrypt tool

It's a tool that can help you turn your images to images that seem to be full of noise and turn it back then.
Notice: Results may be not as good as you expect if you use this tool on highly compressed image formats(jpeg, etc.).

Examples

It uses linear congruential generator and a specific seed(CRC32 of the key) to generate a series of numbers. Then it adds these numbers to the RGB values of every pixel in the image and save the result.

Notice: The result will be written back to the original file.

Add(1) and Sub(0) are the opposite of each other.
While using the same key, if you do same number of Add and Sub operation, you'll get the original image.