Instant messaging （IM） has become one of the most popular online communication tools among consumer and enterprise IM users. It provides instant message delivery, as well as convenient file transfer services. The in...Instant messaging （IM） has become one of the most popular online communication tools among consumer and enterprise IM users. It provides instant message delivery, as well as convenient file transfer services. The increasing popularity and functionalities of IM programs have made it increasingly attractive for attackers, especially for worm writers. IM contact list offers worm an easy way of finding potential victims so that the worm could achieve a surprising spreading speed. This paper first presents our experimental results of simulating IM worm propagation in the logical network defined by IM contact lists, which is reported to be a scale-free network. Then, the existing proposals for detecting and containing IM worm epidemics are discussed. At last, a new algorithm for this purpose is presented, which is based on the observation of the bi-directional nature of IM worm traffic, and its advantages and possible improvements in implementation are analyzed. The simulation results show the proposed algorithm is of significant effect on restricting IM worm propagation.展开更多
By tracing the history of instant messaging(IM),comparing the language used in English IM to historical English,and reviewing the current state of syntax and vocabulary used in IM,some predictions for the future of la...By tracing the history of instant messaging(IM),comparing the language used in English IM to historical English,and reviewing the current state of syntax and vocabulary used in IM,some predictions for the future of language can be made.展开更多
By analyzing current development conditions of mainstream Instant Message technologies and services,some detailed discussion about technical solution and formal operation deployment strategies of P2P Instant Message S...By analyzing current development conditions of mainstream Instant Message technologies and services,some detailed discussion about technical solution and formal operation deployment strategies of P2P Instant Message Services based on Internet is made.Several crucial problems of P2P Instant Message System about services management,interconnection with other instant message,security and profit-making mode are analyzed,,and how to develop P2P IM Services is proposed.展开更多
IMS(IP Multimedia Subsystem)作为下一代网络的核心网的标准架构,在IP多媒体应业务的开发方面,受到了越来越多的关注。本文在IMS呈现的基础上,实现了基于IMS呈现的社交网络管理系统(Social Network Management System based on the IMS...IMS(IP Multimedia Subsystem)作为下一代网络的核心网的标准架构,在IP多媒体应业务的开发方面,受到了越来越多的关注。本文在IMS呈现的基础上,实现了基于IMS呈现的社交网络管理系统(Social Network Management System based on the IMS Presence),它丰富了传统电信IMS呈现的业务能力,将手机地址本扩展为社交网络,丰富了好友间互操作,扩展了群组聊天。本文从业务角度出发,分析了IMS呈现的可扩展性,设计了基于IMS呈现的社交管理系统的架构和功能实体,详细阐述了系统功能实现的关键点,并实现了系统与媒体的接口,最后以单个用户操作、一对一好友操作和群组操作为例,具体实现了相应的功能。展开更多
The ubiquity of instant messaging services on mobile devices and their use of end-to-end encryption in safeguarding the privacy of their users have become a concern for some governments. WhatsApp messaging service has...The ubiquity of instant messaging services on mobile devices and their use of end-to-end encryption in safeguarding the privacy of their users have become a concern for some governments. WhatsApp messaging service has emerged as the most popular messaging app on mobile devices today. It uses end-to-end encryption which makes government and secret services efforts to combat organized crime, terrorists, and child pornographers technically impossible. Governments would like a “backdoor” into such apps, to use in accessing messages and have emphasized that they will only use the “backdoor” if there is a credible threat to national security. Users of WhatsApp have however, argued against a “backdoor”;they claim a “backdoor” would not only be an infringement of their privacy, but that hackers could also take advantage of it. In light of this security and privacy conflict between the end users of WhatsApp and government’s need to access messages in order to thwart potential terror attacks, this paper presents the advantages of maintaining E2EE in WhatsApp and why governments should not be allowed a “backdoor” to access users’ messages. This research presents the benefits encryption has on consumer security and privacy, and also on the challenges it poses to public safety and national security.展开更多
Traffic characteristics of several typical instant messager services under certain scenarios are firstly analyzed,based on real-time data collected in the commercial mobile network.Then criteria for the evaluation of ...Traffic characteristics of several typical instant messager services under certain scenarios are firstly analyzed,based on real-time data collected in the commercial mobile network.Then criteria for the evaluation of the efficiency of the mobile network for the transmission of packet services are proposed in both transport layer and physical layer over air interface.The transmission efficiency of IM services is evaluated and compared under the proposed criteria.Furthermore,a so-called smart resource adaptation algorithm is verified in the effectiveness of improving the wireless transmission efficiency.Finally,improvements to the smart resource adaptation are proposed to further improve the wireless transmission efficiency,and its effectiveness is verified by the calculations.展开更多
With the development of message service in telecom networks as well as the Internet,multiple message service formats have been emerging,including Short Message Service (SMS),Multimedia Messaging Service (MMS),Mobile E...With the development of message service in telecom networks as well as the Internet,multiple message service formats have been emerging,including Short Message Service (SMS),Multimedia Messaging Service (MMS),Mobile Email Message (MEM) and Instant Message (IM).Based on the latest research achievements of OMA CPM Organization and GSMA RCS Organization,the message service evolution may have two phases:Integration and convergence,with corresponding overall framework realization methods.展开更多
基金Supported by the National Natural Science Foundation of China (60573136)
文摘Instant messaging （IM） has become one of the most popular online communication tools among consumer and enterprise IM users. It provides instant message delivery, as well as convenient file transfer services. The increasing popularity and functionalities of IM programs have made it increasingly attractive for attackers, especially for worm writers. IM contact list offers worm an easy way of finding potential victims so that the worm could achieve a surprising spreading speed. This paper first presents our experimental results of simulating IM worm propagation in the logical network defined by IM contact lists, which is reported to be a scale-free network. Then, the existing proposals for detecting and containing IM worm epidemics are discussed. At last, a new algorithm for this purpose is presented, which is based on the observation of the bi-directional nature of IM worm traffic, and its advantages and possible improvements in implementation are analyzed. The simulation results show the proposed algorithm is of significant effect on restricting IM worm propagation.
文摘By tracing the history of instant messaging(IM),comparing the language used in English IM to historical English,and reviewing the current state of syntax and vocabulary used in IM,some predictions for the future of language can be made.
文摘By analyzing current development conditions of mainstream Instant Message technologies and services,some detailed discussion about technical solution and formal operation deployment strategies of P2P Instant Message Services based on Internet is made.Several crucial problems of P2P Instant Message System about services management,interconnection with other instant message,security and profit-making mode are analyzed,,and how to develop P2P IM Services is proposed.
文摘IMS(IP Multimedia Subsystem)作为下一代网络的核心网的标准架构,在IP多媒体应业务的开发方面,受到了越来越多的关注。本文在IMS呈现的基础上,实现了基于IMS呈现的社交网络管理系统(Social Network Management System based on the IMS Presence),它丰富了传统电信IMS呈现的业务能力,将手机地址本扩展为社交网络,丰富了好友间互操作,扩展了群组聊天。本文从业务角度出发,分析了IMS呈现的可扩展性,设计了基于IMS呈现的社交管理系统的架构和功能实体,详细阐述了系统功能实现的关键点,并实现了系统与媒体的接口,最后以单个用户操作、一对一好友操作和群组操作为例,具体实现了相应的功能。
文摘The ubiquity of instant messaging services on mobile devices and their use of end-to-end encryption in safeguarding the privacy of their users have become a concern for some governments. WhatsApp messaging service has emerged as the most popular messaging app on mobile devices today. It uses end-to-end encryption which makes government and secret services efforts to combat organized crime, terrorists, and child pornographers technically impossible. Governments would like a “backdoor” into such apps, to use in accessing messages and have emphasized that they will only use the “backdoor” if there is a credible threat to national security. Users of WhatsApp have however, argued against a “backdoor”;they claim a “backdoor” would not only be an infringement of their privacy, but that hackers could also take advantage of it. In light of this security and privacy conflict between the end users of WhatsApp and government’s need to access messages in order to thwart potential terror attacks, this paper presents the advantages of maintaining E2EE in WhatsApp and why governments should not be allowed a “backdoor” to access users’ messages. This research presents the benefits encryption has on consumer security and privacy, and also on the challenges it poses to public safety and national security.
基金Supported by the National Natural Science Foundation of China(No.61301103)the Importation and Development of High-Caliber Talents Project of Beijing Municipal Institutions(No.CIT&TCD201504039)Funding Project for Academic Human Resources Development in Beijing Union University(No.BPHR2014A03,Rkl00201510)
文摘Traffic characteristics of several typical instant messager services under certain scenarios are firstly analyzed,based on real-time data collected in the commercial mobile network.Then criteria for the evaluation of the efficiency of the mobile network for the transmission of packet services are proposed in both transport layer and physical layer over air interface.The transmission efficiency of IM services is evaluated and compared under the proposed criteria.Furthermore,a so-called smart resource adaptation algorithm is verified in the effectiveness of improving the wireless transmission efficiency.Finally,improvements to the smart resource adaptation are proposed to further improve the wireless transmission efficiency,and its effectiveness is verified by the calculations.
文摘With the development of message service in telecom networks as well as the Internet,multiple message service formats have been emerging,including Short Message Service (SMS),Multimedia Messaging Service (MMS),Mobile Email Message (MEM) and Instant Message (IM).Based on the latest research achievements of OMA CPM Organization and GSMA RCS Organization,the message service evolution may have two phases:Integration and convergence,with corresponding overall framework realization methods.
