Contextual Multi-armed Bandits for the Prevention of Spam in VoIP Networks

Details Contextual Multi-armed Bandits for the Prevention of Spam in VoIP Networks Contextual Multi-armed Bandits for the Prevention of Spam in VoIP Networks

2012-01-30

arxiv.org/abs/1201.6181v1

Computer Science

Networking and Internet Architecture

in submission

Scientific paper

In this paper we argue that contextual multi-armed bandit algorithms could open avenues for designing self-learning security modules for computer networks and related tasks. The paper has two contributions: a conceptual and an algorithmical one. The conceptual contribution is to formulate the real-world problem of preventing SPIT (Spam in VoIP networks), which is currently not satisfyingly addressed by standard techniques, as a sequential learning problem, namely as a contextual multi-armed bandit. Our second contribution is to present CMABFAS, a new algorithm for general contextual multi-armed bandit learning that specifically targets domains with finite actions. We illustrate how CMABFAS could be used to design a fully self-learning SPIT filter that does not rely on feedback from the end-user (i.e., does not require labeled data) and report convincing simulation results.

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