5G network slice security trust degree calculation model

Aiming at the security difference in 5G network slicing service, this paper proposes the network slice trust degree concept and establishes the trust degree calculation model. The network slice manager can be truly and effectively calculate network slice trust value. The model divides the network slice trust value into three parts: the network slice subjective trust value calculation based on the cloud model algorithm, the network slice history trust value calculation based user evaluation, the reward and punishment calculation when the slice runs. During the network slice trust value calculation, the manager can set reasonable weighting parameters for the above three parts according to the different security requirements of the network slices. Meanwhile managers obtain the network subjective trust evaluation data and collect the user trust evaluation data as the calculation sample. Simulation experiments show that the model can effectively calculate the network slice trust value.