基于HTTP-DM的网络隐蔽信道的设计与实现
关键词 网络安全 隐蔽信道技术 时间间隔 时间隐蔽信道
毕业设计说明书外文摘要
Title The design and the implementation of the covert channel based on HTTP-DM
Abstract
Network security problems associated with the development of computer network has become hot topic. Network and rapid development, make the normal transmission of information flow in the greater threat. Network covert channel technology refers to using some special means, in the case of others is hard to detect completion message technology leaks. Covert channel can be found in this paper, images, audio, and video. Covert channel is pided into two kinds: sorage covert channel and time covert channel. There is the direct and indirect number of sender in sorage covert channel and it can read it.Time covert channel adjusts the rate of the packet to send message.This task is the design and the implementation of the covert channel, design a time covert channel based an model,with the analyze of the normal packet time interval, simulate the distribution of the normal packet time delay,then according to the distribution send the covert message.
Keywords network security technology of covert channel time interval time covert channel
目 次
1 引言1
1. 1 课题背景1
1.1.1 隐蔽信道的发展 1
1.1.2 隐蔽信道涉及的领域 2
1.1.3 HTTP协议 2
1.2 研究现状 3
1.3 主要工作 4
2 隐蔽信道的分类 5
2．1 时间信道和存储信道 5
2.1.1 时间隐蔽信道 5
2.1.2 存储隐蔽信道 5
2.2 主动隐蔽信道和被动隐蔽信道 5
2.3 有噪信道和无噪信道 5
3 Linux下的隐蔽信道 7
3.1 Linux网络体系结构介绍 7
3.1.1内核结构 7
3.1.2 内核体系结构 8
3.2 Linux环境下隐蔽信道的构建方式 9
4 基于模型的时间隐蔽信道 10
4.1 基于模型的时间隐蔽信道概况分析 10
4.2 一个简单可靠的隐蔽信道的解码和编码 11
5 Linux环境下基于HTTP-DM的网络隐蔽信道的设计与实现 13
5.1 信道设计实现的平台 13
5.1.1 系统环境 13
5.1.2 Linux下的QT Creator 13
5.2 HTTP-DM算法 13
5.2.1 实现算法 14
5.2.2 解码算法 15
5.3 HTTP-DM隐蔽信道的设计 15
5.4 发送端的设计 15