WINSOME: a Middleware Platform for the Provision of Secure Monitoring Services over Wireless Sensor Networks

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1 WINSOME: a Middleware Platform for the Provision of Secure Monitoring Services over Wireless Sensor Networks L. Pomante, M. Pugliese, S. Marchesani, F. Santucci University of L Aquila ITALY Center of Excellence DEWS {luigi.pomante, stefano.marchesani, 1

2 Outline Background & motivations A service-based modular architecture The WINSOME platform components WIDS TAKS/ECTAKS/TAKS2 The WINSOME platform Conclusions and future work 2

3 Background & motivation WINSOME (WIreless sensor Network-based Secure system for structural integrity Monitoring and AlErting) provides secure monitoring services, supported by flexible and cheap systems, in areas where ordinary networks are unsuitable Wireless Sensor Networks represent a promising technological solution but resource constraints and exposure to external attacks could limit their employment 3

4 Background & Motivation In such a context, this work focuses on design and implementation issues of a security framework suitable for monitoring applications that rely on WSNs We have exploited the Platform-Based Design methodology to define a Secure Platform Clear separation of functional and architectural aspects 4

5 A service-based modular architecture e.g. data transmission e.g. intrusion detection e.g. system monitoring ApplicationA 1 ApplicationA 2 ApplicationA n Secure Link Generation Anomaly Detection other services Node Authentication Data Processing underlying WSN 5

6 The WINSOME platform components Network security issues System Availability Data Confidentiality, Integrity and Authentication WINSOME solution through the following components Intrusion Detection System (IDS) Based on Weak Process Models (WPM) Cryptographic Scheme (CS) Based on Topology Authenticated Key Scheme (TAKS) 6

7 Intrusion Detection System INTRUSION DETECTION ID Threat Model WIDS Misuse-based approach Threats are modeled with WPM Anomaly Detection Logic IRL Defence Strategy INTRUSION HANDLING IRLA Audit Data Alarm Tracking Countermeasure Application 7

8 WIDS: WPM-based IDS State Threat Observable HPA Score associated to WPM transition LPA State class State path associated to an abnormal behaviour k=1 k=2 k=3 k=4 k=5 k= Observation step The corresponding (weighted) state trace Pugliese, Giani, Santucci, A Weak Process Approach to Anomaly Detection in Wireless Sensor Networks, Procs. 1 st Intern. Workshop on Sensor Networks (SN2008), Virgin Islands,

9 TAKS/ECTAKS/TAKS2 Cryptographic scheme defined at DEWS and specifically designed for WSN because Hybrid cryptography Authentication and key generation are based on network topology, a key concept in WSN Suited for dynamic network topologies Suited for clustered WSN (gen. of clusterwise keys) No need of a centralised Certification Authority It does not need any key agreement protocol 9

10 TAKS/ECTAKS/TAKS2 Loc. Key Comp. i Loc. Pld. Top. i External server Loc. Pld. Top. j Loc. Key Comp. j TAK(lkc i, t i ) d i c i τ α m SS SS=TAK(lkc j, d i ) Encr SS (m) MAC(c i,ss) Auth(MAC(c i,ss),τ)=0 OK d i c i τ Decr SS (c i ) m n i n j Marchesani, Pomante, Pugliese, Santucci, Definition and Development of a Topology-based Cryptographic Scheme for Wireless Sensor Networks, Procs. 4 th Intern. Conference on Sensor Systems and Software (S-CUBE2013), Lucca,

11 The WINSOME Platform (1) Clustered WSN Functionality accomplished by Static SW components (SWC) or Dynamic SW components (DSWC) as mobile agents We have exploited the AGILLA middleware Tuple Space Neighbor List Agent Migration MA1 MAn (AAEE) ) Tuple Space AGILLA Neighbor List Manager TinyOS WSN protocol stack 11

12 The WINSOME Platform (2) MA1 MA2 MAn DSWC1 DSWC2 DSWCn AGILLA AGILLA ApplicationExecutionEnvironment(AAEE) Environment ) Tuple Space Neighbor List AGILLA Manager SW component SW component SW component TinyOS underlying WSN protocol WSN stack 12

13 The WINSOME Platform (3) Mobile Agent A 11 Mobile Agent A 2 2 Mobile IRL/IRLAgent A n AGILLA Application Execution Environment (AAEE)) Tuple Space Neighbor List AGILLA Manager SW component TAKS / ECTAKS WIDS Secure Platform TinyOS WSN underlying protocolwsn stack TinySEC / TinyECC 13

14 The WINSOME Platform (4) MA1 MAn IRL IRLA MA1 MAn AGILLA EAAEE Application AGILLA EAAEE Application AGILLA TAKS / ECTAKS WIDS Rest of WSN AGILLA TAKS / ECTAKS WIDS TinyOS WSN protocol stack TinyOS WSN protocol stack MA1 MAn AGILLA EAAEE Application AGILLA TAKS / ECTAKS WIDS MA1 MAn TinyOS WSN protocol stack AGILLA EAAEE Application AGILLA TAKS / ECTAKS WIDS TinyOS WSN protocol stack INTRUDER 14

15 The WINSOME platform (5) Performance evaluation Cryptographic Scheme IDS Implementation on MicaZ with 128-bit keys using CBC, CBC-MAC with Skipjack as block cipher Transmission phase: 15,42 ms Reception phase: 8,34 ms Estimation from data above on WPM modelling 3 types of threat Score generation: 1-10 ms 15

16 Conclusions and Future Work We have presented an agent-based Security Platform for WSN Monitoring Applications (WINSOME) Security functions are executed directly by nodes and complexity in IDS management is reduced due to the use of mobile agents and clustered tree topology Currently we are carrying on early experimentations on MicaZ and working on the full implementation of the proposed architecture WINSOME has been motivated and supported by the ESF-COST Action IntelliCIS The development of the middleware platform also fits in the frame of the Projects Ricostruire and SMILING supported by the Ministry of Economic Development to enhance technology transfer in the RIDITT framework. 16

17 Previous works related to About TAKS/ECTAKS/TAKS2 WINSOME Pugliese, Santucci, Pair-wise Network Topology Authenticated Hybrid Cryptographic Keys for Wireless Sensor Networks using Vector Algebra, Procs. 4 th IEEE Intern. Workshop on Wireless Sensor Networks Security (WSNS2008), Atlanta, Marchesani, Pomante, Pugliese, Santucci, Definition and Development of a Topology-based Cryptographic Scheme for Wireless Sensor Networks, Procs. 4 th Intern. Conference on Sensor Systems and Software (S-CUBE2013), Lucca, About WIDS Pugliese, Giani, Santucci, A Weak Process Approach to Anomaly Detection in Wireless Sensor Networks, Procs. 1 st Intern. Workshop on Sensor Networks (SN2008), Virgin Islands, Pugliese, Giani, Santucci, Weak Process Models for Attack Detection in a Clustered Sensor Network using Mobile Agents, Procs. 1 st Intern. Conference on Sensor Systems and Software (S-CUBE2009), Pisa, About WINSOME design and implementation Pugliese, Pomante, Santucci, Agent-based Scalable Design of a Cross-Layer Framework for Secure Monitoring Applications, Procs. Intern. Workshop on Scalable Ad-hoc and Sensor Networks (SASN2009), Saint Petersburg, Pugliese, Pomante, Santucci, Secure Platform over Wireless Sensor Networks, chapter V in Applied Cryptography and Network Security, ISBN , INTECH Publishers,

18 Thank you for the attention 18

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