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Spam over Internet Telephony (SPIT) refers to a prerecorded advertising call using the Voice over Internet Protocol (VoIP) as a medium. It is expected to be a serious problem in the near future because of the rapidly growing number of VoIP users and the cost-effectiveness for spammers. The real-time nature of a call makes it difficult to detect SPIT. This paper describes a trust-based SPIT detection...
The IP Multimedia Subsystem (IMS) is constantly evolving to meet the growth of mobile services and Internet applications. One major security problem of the IMS is flooding attacks. There are many works that have been proposed to detect such attacks. However, generally, the detection systems trigger many alarms and most of them are false positives. These false alarms impact the quality of the detection...
The IP Multimedia Subsystem (IMS) supports many kinds of multimedia services and is constantly evolving to meet the growth of mobile services and Internet applications. However, the security specifications of IMS networks do not provide any features to protect the system against Denial of Service (DoS) attacks, so a malicious attack can block the system by congesting a core service of IMS. To address...
Spam over Internet Telephony (SPIT) will become a serious threat in the near future because of the growing number of Voice over IP (VoIP) users. Due to the real-time processing requirements of voice communication, SPIT is more difficult to filter than email spam. We propose a trust-based mechanism that uses the duration of calls between users to distinguish legitimate callers and spammers. The trust...
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