Image Encryption and Decryption using Rubik's cube Algorithm in C#

Basically it's:

1. Permute your pixels by first rotating each row and column by some steps
2. Encrypt each pixel using XOR (probably this step is meant to obfuscate the permutation from step 1)
3. Repeat a couple of times

The algorithm uses a "seed" of (number of columns + number of rows + 1) numbers to define individual rotations for each row and column, and individual XOR values for each pixel.

The "Rubiks Cube" part of this algorithm doesn't introduce anything conceptionally new (defining a permutation), but it helps by providing a non-trivial scheme that can be defined with a relatively low number of key values.

I'd like to add, that while this algorithm is supposed to be applied on images only, nothing stops you from interpreting any kind of data as an image, or sequence of images: e. g. you could split up a big file into 64KB blocks, and then interpret each block as a 256x256 greyscale image with 256 grey scales per 'pixel' (stored as one byte each).