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Paper Abstract and Keywords
Presentation 2006-09-15 15:00
Using Multiple Normal states for Network Anomaly Detection
Naotoshi Hiramatsu, Yuji Waizumi, Hiroshi Tsunoda, Yoshiaki Nemoto (Tohoku Univ) CS2006-32
Abstract (in Japanese) (See Japanese page) 
(in English) Network anomaly detection requires modeling the normal state of the
network. When the observation quantities of networks are the mixtures of
multiple correlations, correlations between the observed quantities
cannot be approximated with a single model. This retards the system's
ability in correctly detecting anomaly. In this paper, we propose a
novel clustering technique which defines multiple normal states of
network by assigning data with different correlations to different
Furthermore, based on the data distribution of the multiple
clusters, we also propose a scheme to select both kinds of models -
models that use correlations and models that do not. Hence, we succesfully
formulate a scheme to dynamically select the model that is most suitable
to the prevailing network state. We evaluate the ability the proposed
clustering scheme and the model selection scheme in detecting anomalous
events and present the results.
Keyword (in Japanese) (See Japanese page) 
(in English) Network anomaly detection / multiple normal states / clustering / correlations / / / /  
Reference Info. IEICE Tech. Rep., vol. 106, no. 238, CS2006-32, pp. 61-66, Sept. 2006.
Paper # CS2006-32 
Date of Issue 2006-09-07 (CS) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee IN NS CS  
Conference Date 2006-09-14 - 2006-09-15 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English) VPN, NAT, Network security, DDos, P2P, etc. 
Paper Information
Registration To CS 
Conference Code 2006-09-IN-NS-CS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Using Multiple Normal states for Network Anomaly Detection 
Sub Title (in English)  
Keyword(1) Network anomaly detection  
Keyword(2) multiple normal states  
Keyword(3) clustering  
Keyword(4) correlations  
1st Author's Name Naotoshi Hiramatsu  
1st Author's Affiliation Tohoku University (Tohoku Univ)
2nd Author's Name Yuji Waizumi  
2nd Author's Affiliation Tohoku University (Tohoku Univ)
3rd Author's Name Hiroshi Tsunoda  
3rd Author's Affiliation Tohoku University (Tohoku Univ)
4th Author's Name Yoshiaki Nemoto  
4th Author's Affiliation Tohoku University (Tohoku Univ)
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Date Time 2006-09-15 15:00:00 
Presentation Time 20 
Registration for CS 
Paper # IEICE-CS2006-32 
Volume (vol) IEICE-106 
Number (no) no.238 
Page pp.61-66 
#Pages IEICE-6 
Date of Issue IEICE-CS-2006-09-07 

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