针对全IP融合网络环境下的垃圾语音信息(spam over Internet telephony,SPIT)隐患,提出了一种基于反馈评判的检测与防范方法.该方法引入了终端用户的参与,结合信任与信誉机制,能够简单、高效、无损地利用直接和间接的反馈信息.改进的信...针对全IP融合网络环境下的垃圾语音信息(spam over Internet telephony,SPIT)隐患,提出了一种基于反馈评判的检测与防范方法.该方法引入了终端用户的参与,结合信任与信誉机制,能够简单、高效、无损地利用直接和间接的反馈信息.改进的信任度与信誉度推理算法充分体现了SPIT行为的分布特性并反映了影响评判结果的各因素的权重关系.增量学习算法保证了信任度和信誉度的实时性,融合算法则动态调整了信任度和信誉度在评判中的角色.实验及分析表明上述方法具有较好的准确性和敏感性,能够对SPIT进行有效的检测及防范.展开更多
针对固定移动融合(FMC)网络环境下的垃圾语音信息(Spam over Internet Telephony,SPIT)隐患,提出了一种多层次的检测方法。该方法首先深入剖析SPIT攻击独有的特点,增强检测的针对性。然后分多个层次进行检测,信令监控算法根据SPIT独有...针对固定移动融合(FMC)网络环境下的垃圾语音信息(Spam over Internet Telephony,SPIT)隐患,提出了一种多层次的检测方法。该方法首先深入剖析SPIT攻击独有的特点,增强检测的针对性。然后分多个层次进行检测,信令监控算法根据SPIT独有的特点来监控所有SPIT相关的原子信息;统计分析算法对原子信息进行统计,得到具有统计特性的更高语义级别的告警;关联分析算法对告警进行关联,识别出攻击的行为踪迹,重构攻击场景。仿真实验与分析证明了该方法的功能与性能满足SPIT检测的需求。展开更多
针对基于SIP协议的SPIT攻击(Spam over Internet Telephony,SPIT),提出一种基于统计的SPIT检测方法。该方法提取用户多个行为属性和采用D-S理论将多个属性进行融合,实现对多种攻击方式的检测。同时,对域进行分类有区别地考虑域发动攻击...针对基于SIP协议的SPIT攻击(Spam over Internet Telephony,SPIT),提出一种基于统计的SPIT检测方法。该方法提取用户多个行为属性和采用D-S理论将多个属性进行融合,实现对多种攻击方式的检测。同时,对域进行分类有区别地考虑域发动攻击的可能性和用户的合法性,提高了检测的准确性。实验及分析表明上述方法具有较好的准确性,能够针对SPIT进行有效的检测。展开更多
By using satellite remote sensing informations, the conceptual system of time-space at tributes and time dimension in recent evolution of the sand spit at the Huanghe River mouth is expound ed. Based on this work, the...By using satellite remote sensing informations, the conceptual system of time-space at tributes and time dimension in recent evolution of the sand spit at the Huanghe River mouth is expound ed. Based on this work, the parameterization of relevant factors and topological analysis of sand spit spa tial structure are conducted, and a model, which is suitable for representing the development and growth of the Huanghe River mouth is developed. It is shown that during the later stage of its development, the Sand spit growth index is almost 0. According to the parallelogram rule, under the reinforce effects of the Coriolis force and ocean dynamics, the Sand spit of current stream will never extend towards sea when it reaches the deep-water area. This work would be helpful to the imminent comprehensive harness of the 'man-made river branch' at the Huanghe River mouth.展开更多
随着固定移动融合(Fixed Mobile Convergence,FMC)网络的发展,基于会话初始协议(Session Initial Protocol,SIP)的VoIP(Voice over IP)无疑将成为全IP融合网络环境下最为重要的业务应用。然而SIP在设计之初便存在诸多安全隐患,VoIP又是...随着固定移动融合(Fixed Mobile Convergence,FMC)网络的发展,基于会话初始协议(Session Initial Protocol,SIP)的VoIP(Voice over IP)无疑将成为全IP融合网络环境下最为重要的业务应用。然而SIP在设计之初便存在诸多安全隐患,VoIP又是采用开放、互通的应用模式,因此垃圾语音信息(Spam over Internet Telephony,SPIT)作为一种非预期的语音发送行为,成为全IP语音业务发展中的重要安全威胁。展开更多
文摘针对全IP融合网络环境下的垃圾语音信息(spam over Internet telephony,SPIT)隐患,提出了一种基于反馈评判的检测与防范方法.该方法引入了终端用户的参与,结合信任与信誉机制,能够简单、高效、无损地利用直接和间接的反馈信息.改进的信任度与信誉度推理算法充分体现了SPIT行为的分布特性并反映了影响评判结果的各因素的权重关系.增量学习算法保证了信任度和信誉度的实时性,融合算法则动态调整了信任度和信誉度在评判中的角色.实验及分析表明上述方法具有较好的准确性和敏感性,能够对SPIT进行有效的检测及防范.
文摘针对固定移动融合(FMC)网络环境下的垃圾语音信息(Spam over Internet Telephony,SPIT)隐患,提出了一种多层次的检测方法。该方法首先深入剖析SPIT攻击独有的特点,增强检测的针对性。然后分多个层次进行检测,信令监控算法根据SPIT独有的特点来监控所有SPIT相关的原子信息;统计分析算法对原子信息进行统计,得到具有统计特性的更高语义级别的告警;关联分析算法对告警进行关联,识别出攻击的行为踪迹,重构攻击场景。仿真实验与分析证明了该方法的功能与性能满足SPIT检测的需求。
文摘针对基于SIP协议的SPIT攻击(Spam over Internet Telephony,SPIT),提出一种基于统计的SPIT检测方法。该方法提取用户多个行为属性和采用D-S理论将多个属性进行融合,实现对多种攻击方式的检测。同时,对域进行分类有区别地考虑域发动攻击的可能性和用户的合法性,提高了检测的准确性。实验及分析表明上述方法具有较好的准确性,能够针对SPIT进行有效的检测。
基金National Natural Science Foundation of China ! 49871056.
文摘By using satellite remote sensing informations, the conceptual system of time-space at tributes and time dimension in recent evolution of the sand spit at the Huanghe River mouth is expound ed. Based on this work, the parameterization of relevant factors and topological analysis of sand spit spa tial structure are conducted, and a model, which is suitable for representing the development and growth of the Huanghe River mouth is developed. It is shown that during the later stage of its development, the Sand spit growth index is almost 0. According to the parallelogram rule, under the reinforce effects of the Coriolis force and ocean dynamics, the Sand spit of current stream will never extend towards sea when it reaches the deep-water area. This work would be helpful to the imminent comprehensive harness of the 'man-made river branch' at the Huanghe River mouth.
文摘随着固定移动融合(Fixed Mobile Convergence,FMC)网络的发展,基于会话初始协议(Session Initial Protocol,SIP)的VoIP(Voice over IP)无疑将成为全IP融合网络环境下最为重要的业务应用。然而SIP在设计之初便存在诸多安全隐患,VoIP又是采用开放、互通的应用模式,因此垃圾语音信息(Spam over Internet Telephony,SPIT)作为一种非预期的语音发送行为,成为全IP语音业务发展中的重要安全威胁。
