Steganalysis technique is of great importance to network information security and how to search and detect secret messages transferred in network is crucial and practical to safeguard national security. Against a variety of DCT coefficients distribution model proposed by the scholars at home and abroad

this paper introduces the α-stable family models of the image’s DCT coefficients. Take into account real statistical properties

this paper also describes the α-stable family models of cover image’s DCT domain by the numbers. And we also testifieed by the experiment that image’s DCT coefficients satisfy α-stable family distribution but GGD(generalized Gaussian distribution) and Gaussian distribution and Lapalacian distribution. The α-stable family models have enough flexibility

and their shape of distribution changes with characteristic index α.At same time

this paper designs a new processor to blindly hide information detection using Cauchy receiver operating machine based on project needs: facility

practicality

feasibility and performance good. This detection performance is better than GGD’s detection performance. Compared to the reference ［8］

our model performance enhanced.The operating speed is increased by scores of times.