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Research and Implementation of covert communication of multimedia data network communication system

Author: LiuAnZuo
Tutor: FangBin；QianYuWen
School: Nanjing University of Technology and Engineering
Course: Control Engineering
Keywords: Information Hiding Covert communications VoIP LSB
CLC: TP393.08
Type: Master's thesis
Year: 2012
Downloads: 21
Quote: 0
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Abstract


With the rapid development of electronic information technology and network applications , network information security is a growing problem . Computer network , multimedia data flow design hidden letter Road is in the information hidden areas of the network multimedia transmission technology and information hidden technology combining arising from emerging technologies , to protect the confidentiality of information security transmission has significance , has gradually caused domestic research scholars outside interest . With the deepening and development of the network in the field of e-commerce , politics and military , based on covert communications computer network multimedia data streaming technology has become an important means of protecting the secure transmission of confidential information , and this is precisely the information hiding technology development direction. The current prospects for the development of the technology , we completed the following tasks : ( 1) study the VoIP network works , signaling protocols H.323 for voice communications platform ; ( 2) based on the concealed information system of the VoIP voice communication platform , use LSB improved algorithm of the confidential information is embedded into the voice information data , in order to achieve the secure transmission of confidential information ; (3) on this basis for secure transmission the various parts of the system performance of the related verification, including the time delays brought about by the information embedding process , and the influence of the quality of the original audio . Retransmission mechanism designed to protect the integrity of confidential information in the case of packet loss . Experiments show that the proposed information hiding system based on VoIP voice transmission platform with better security , real-time , and concealment . Verify the validity of the covert communication program . Therefore , the subject has important theoretical and practical significance for the research in the field of network and information security , and has a certain practical prospects .

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Computer network > General issues > Computer Network Security
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