Well, thanks for trying. Unfortunately, I find your paper largely confusing and unclear. First of all, what problem do you intend to solve that has not been solved by standard techniques already? Second, I get the impression that you have a poor understanding of the state of the art in applied cryptography. For example, it should not be necessary to transmit the "master key" to the server. If you are trying to build this for your own exchange I suggest hiring someone who has read a book or two about theoretical computer science/cryptography.