Abstract
With the increased deployment of VoIP networks, the incentive for telemarketers to spam VoIP users with unsolicited voice sessions has also substantially increased. The best way to counter VoIP spam is to have strong counter mechanisms in the IP network to prevent spam effectively. In this white paper, we provide technical analysis of the risks posed by VoIP spam, discuss the mechanisms to counter VoIP spam and propose the Voice Printing and Reachability Code (VPARC) architecture to effectively counter VoIP spam. The focus of this paper is on presenting the architectural model and the principles therein. The paper does not detail all the implementation aspects of the architecture and specifics of the protocol changes required although different design approaches are described without going into specific changes required to realize the same.

Authors Vijay Radhakrishnan Ranjith Mukundan

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