Mobility

Classification of SIP Messages by a Syntax Filter and SVMs

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Executive Summary

The Session Initiation Protocol (SIP) is at the root of many sessions-based applications such as VoIP and media streaming that are used by a growing number of users and organizations. The increase of the availability and use of such applications calls for careful attention to the possibility of transferring malformed, incorrect, or malicious SIP messages as they can cause problems ranging from relatively innocuous disturbances to full blown attacks and frauds. To this end, SIP messages are analyzed to be classified as "Good" or "Bad" depending on whether this structure and content are deemed acceptable or not.

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