FTP协议信息隐藏方法的研究与改进  

Information hiding methods research and improvement based on FTP protocol

作　　者：李彩秋[1] 周亚建[1] 魏更宇[1] 

机构地区：[1]北京邮电大学计算机学院,北京100876

出　　处：《计算机工程与应用》2013年第21期111-113,127,共4页Computer Engineering and Applications

基　　金：国家自然科学基金(No.61003284);北京市自然科学基金(No.4122053)

摘　　要：通过对FTP协议进行研究,提出了两种基于FTP协议的信息隐藏方法,分析了两种信息隐藏方法的安全性、隐藏容量、鲁棒性。对基于FTP协议的分级序列长度隐蔽信道进行了改进,对改进前后两种方法进行了比较,使隐藏容量大幅度提高。Two methods of protocols steganography are discovered by using FTP protocol commands based on the study of FTP protocol. The characters of covert channels, which are bandwidth, sneakiness and robustness, based on the two methods are analyzed. In addition, the covert channel based on the classification of command sequence length of FTP protocol has been improved. The methods before and after the improvement are compared. The conclusion proves that the improved method has improved the bandwidth greatly.

关 键 词：信息隐藏 文件传输协议(FTP) 命令 隐蔽信道 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]