Abstract:

An efficient hidden form written information transfer system attack detection algorithm is proposed based on multiplexing beam domain constraints.The network steganography information transmission system model is designed.The signal extraction of intrinsic frequency is taken,group delay and envelope signal features are extracted,and block frequency on encrypted data link layer is detected.The multiplexed beam domain constraints are extracted to output frequency division multiplexing decomposition in order to improve the detection probability.By the minimum mean square error criterion,the beam domain constraint attack signals in network steganography information transfer system is obtained to achieve the formation,thus realizing orthogonal frequency separation,interference noise suppression,and efficient attack signal detection.The simulation results show that the algorithm has good anti noise performance and higher probability of detection with obvious attacks signal peak,and is of application value in network security design and signal detection.

Key words: network;encryption information;attack detection;virus;beamforming