As is illustrated in many literature, optimization decomposition technologies such as Benders Decomposition or ADMM have been used in OPF , UC or ED models to keep the privacy of different agents and simplify the calculation of the whole model. However, the iterative relation of problem serialization is quite different from the parallel structure of real situation. The information exchanged between the main and sub problems may also reveal the user's privacy. My question is how to measure the privacy of exchanged information? Is there a suitable algorithm which can solve the problem perfectly?