摘要
为了解决当前网络数据包在嵌入水印时需要对数据包的内容进行修改以及分组方式单一性的问题,通过理论分析和计算,提出一种基于变化分组时隙窗口的新型流水印技术.给出了交替变化的时隙窗口划分的具体操作步骤及调制数据包发送延迟平均值的规则,同时采用码分复用技术对水印信息进行扩展后再传输,增强其纠错能力.为验证新技术的性能,模拟了不同网络环境,分别进行多次测试,同时用两种相似率计算方法计算检测率值的大小.试验结果表明,抖动时间均值超过6 ms时,新型水印技术检测率高于原始分组技术28%;另外若在抖动均值范围小于10 ms时,新型水印技术检测的误码率均值低于0.49,而原始水印误码率高于0.5.比较可知,新技术能明显提高检测率,性能良好.
In order to solve the changing contents and the simple grouping of packet in current watermarking technologies,a new watermarking scheme was proposed based on theoretical analysis and calculation. The packet delay was modulated subtly in the interval-based changing slot network stream watermarking scheme. The code division multiplexing was used to extend the watermark information and improve the error correction ability. To test and verify the performance of new technology,various network environments were simulated to complete many tests,and the detection rates were calculated by two ways. The experimental results show that the detection rate of new scheme is increased by 28% than the original group packet when the jitter average is more than 6 ms. When the jitter average is less than 10 ms,the mean detection error rate of new technology is less than 0. 49,while the rate of original way is more than 0. 5. The comparison shows that the new technology can improve the detection rate clearly with high performance.
出处
《江苏大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2015年第3期324-330,336,共8页
Journal of Jiangsu University：Natural Science Edition
基金
国家"863"计划项目(2007AA04ZIB2)
江苏省科技攻关项目(BE2007071)
关键词
网络流水印
变化分组
包间隔均值
鲁棒性
码分复用
network stream watermarking different intervals averaging packet delay robustness code division multiplexing
作者简介
严圣华（1975-），男，江苏镇江人，副教授（yanshl975@163．com），主要从事计算机网络、信息管理研究．
周莲英（1964-），女，江苏泰州人，教授，博士生导师（zhouly@ujs．edu．cn），主要从事信息安全技术与电子商务技术研究．
