计算机工程与应用
計算機工程與應用
계산궤공정여응용
COMPUTER ENGINEERING AND APPLICATIONS
2013年
21期
111-113,127
,共4页
信息隐藏%文件传输协议(FTP)%命令%隐蔽信道
信息隱藏%文件傳輸協議(FTP)%命令%隱蔽信道
신식은장%문건전수협의(FTP)%명령%은폐신도
protocols steganography%File Transfer Protocol(FTP)%commands%covert channel
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。
通過對FTP協議進行研究，提齣瞭兩種基于FTP協議的信息隱藏方法，分析瞭兩種信息隱藏方法的安全性、隱藏容量、魯棒性。對基于FTP協議的分級序列長度隱蔽信道進行瞭改進，對改進前後兩種方法進行瞭比較，使隱藏容量大幅度提高。
통과대FTP협의진행연구，제출료량충기우FTP협의적신식은장방법，분석료량충신식은장방법적안전성、은장용량、로봉성。대기우FTP협의적분급서렬장도은폐신도진행료개진，대개진전후량충방법진행료비교，사은장용량대폭도제고。
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.
