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27 March 2012
Paper published in a book (Scientific congresses and symposiums)
SPRT for SPIT: Using the Sequential Probability Ratio Test for Spam in VoIP Prevention
Jung, Tobias  ; Martin, Sylvain  ; Ernst, Damien  et al.
2012 • In Proc. of 6th International Conference on Autonomous Infrastructure, Management and Security
Peer reviewed
 

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Keywords :
Spam; VoIP; Sequential probability ratio test
Abstract :
[en] This paper presents the first formal framework for identifying and filtering SPIT calls (SPam in Internet Telephony) in an outbound scenario with provable optimal performance. In so doing, our work deviates from related earlier work where this problem is only addressed by ad-hoc solutions. Our goal is to rigorously formalize the problem in terms of mathematical decision theory, find the optimal solution to the problem, and derive concrete bounds for its expected loss (number of mistakes the SPIT filter will make in the worst case). This goal is achieved by considering a scenario amenable to theoretical analysis, namely SPIT detection in an outbound scenario with pure sources. Our methodology is to first define the cost of making an error, apply Wald’s sequential probability ratio test, and then determine analytically error probabilities such that the resulting expected loss is minimized. The benefits of our approach are: (1) the method is optimal (in a sense defined in the paper); (2) the method does not rely on manual tuning and tweaking of parameters but is completely self-contained and mathematically justified; (3) the method is computationally simple and scalable. These are desirable features that would make our method a component of choice in larger, autonomic frameworks.
Disciplines :
Computer science
Author, co-author :
Jung, Tobias ;  Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Réseaux informatiques
Martin, Sylvain ;  Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Réseaux informatiques
Ernst, Damien ;  Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Smart grids
Leduc, Guy ;  Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Réseaux informatiques
Language :
English
Title :
SPRT for SPIT: Using the Sequential Probability Ratio Test for Spam in VoIP Prevention
Publication date :
2012
Event name :
6th International Conference on Autonomous Infrastructure, Management and Security (AIMS 2012)
Event place :
Luxembourg, Luxembourg
Event date :
from 04-06-2012 to 08-06-2012
Audience :
International
Main work title :
Proc. of 6th International Conference on Autonomous Infrastructure, Management and Security
Publisher :
Springer Berlin
Heidelberg
ISBN/EAN :
978-3-642-30632-7
Peer reviewed :
Peer reviewed
European Projects :
FP7 - 224619 - RESUMENET - Resilience and Survivability for future networking: framework, mechanisms, and experimental evaluation
Funders :
CE - Commission Européenne

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