The Design and Implementation of a Modularized Platform for Lawful Intercept in VoIP Networks and Real-time Steganalysis in Multicast Networks

• Main Authors: Yuan-Tai Tsai, 蔡元泰
• Other Authors: 吳坤熹
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/13162191370379001904

碩士 === 國立暨南國際大學 === 資訊工程學系 === 103 === The plethora of Internet applications brings impact on many aspects of our lives.Even criminals learned to use VoIP (Voice over Internet Protocol) to replace old-fashioned telephone systems. Some criminals even use steganography to hide secrete messages.When law enforcement department tries to intercept the VoIP calls, only normal conversation will be heard, but secrete data have actually been delivered. Unlike secret messages hidden in image/audio files, VoIP steganography must be detected in real-time.Furthermore, there are different methods of steganography, so lots of steganalysis algorithms must be applied to analyze those data in real-time. These all contribute great challenges to VoIP steganalysis. In this paper, we proposed a VoIP monitoring system which can perform steganalysis in real-time. It is composed by modularized functions which makes the steganalysis system to be easily extensible.