| The Network Flows Watermark technology is a means of Anonymity Network Tracking,which is mainly to explore and improve the watermark carrier.Watermark technology based on packet load cannot effectively apply to packet encryption scenario,and watermarking technology based on the flow rate is greatly influenced by the network stability,most of watermarking technology is not only unadapted to multiflow tracking.Aiming at the problem of noise interference and multi-stream tracing in traceability of anonymity network,an Interval Packet Size Based Spread Spectrum Network Flows Watermark(IPSSS)is proposed,which combines the original direct sequence spread spectrum technology to improve the watermarking carrier.IPSSS solves the multi-stream tracking problem that most watermarking techniques cannot achieve by using the direct sequence spread spectrum for the original watermarking,and takes the average packet size in the time interval as the carrier of the watermark by adjusting the average packet size in the time interval,which solves the problem of the network stability of the watermarking technique.The experimental results show that adjusting the threshold to a certain extent in watermark embedding effectively improves the integrity of the watermark in the propagation process,which ensures the best effect of noise removal.By using the pseudo-random code in the spreading process,the concealment of the watermark is improved.Meanwhile the two pseudo-random codes have some relevance in the case of multi-stream tracking,so that the tracking achieve excellent effects. |
