CAMA - Secure communication in cellular and ad hoc...

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Secure communication in cellular and ad hoc environments Bharat Bhargava bb@cs.purdue.edu Department of Computer Sciences, Purdue University This is supported by Motorola Communication Research Lab & National Science Foundation
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Team at Motorola: Jeff Bonta George Calcev Benetido Fouseca Trefor Delve Team at Purdue University: X. Wu Research scientist (receives his PhD from UC-Davis) Y. Lu PhD student G. Ding PhD student W. Wang PhD student
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3 Problem statement How to provide secure, continuous, and efficient connectivity for a mobile unit in a structured (cellular based) or unstructured (ad hoc) network environment?
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4 Challenges Dynamic topology Movement, node failure, etc. Heterogeneous and decentralized control Limited resources Bandwidth, processing ability, energy Unfriendly environment Selfish nodes, malicious attackers
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5 Research contributions Combining advantages of cellular systems and ad hoc networks to enable a more secure network structure and better performance Designing routing protocols for ad hoc networks that adapt to both network topology and traffic congestion Designing intruder identification protocols in ad hoc networks Conducting experimental studies in heterogeneous wireless environments and evaluating our protocols
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6 Research directions Cellular-aided Mobile Ad Hoc Network (CAMA) Adaptive and Heterogeneous Mobile Wireless Networks Intruder Identification in Ad Hoc Networks
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Cellular-aided Mobile Ad Hoc Network (CAMA)
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8 CAMA: Problem Statement How to realize commercial peer-to-peer applications over mobile wireless ad hoc networks? Papers: Integrating Heterogeneous Wireless Technologies: Cellular-Aided Mobile Wireless Ad hoc Networks (CAMA) ”, submitted to ACM Special Issues of the Journal on Special Topics in Mobile Networking and Applicaitons (MONET).
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9 Challenges Authentication and accounting No fixed membership Security concern Open medium without any centralized control Real time services Dynamic topology and slow routing information distribution
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10 Current Environment Cellular network provides: Wide coverage Multiple services with single cellular ID Small packet service in 3G network Wireless terminals with different protocols
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11 CAMA Description Integration of cellular network and ad hoc network CAMA agent works as centralized server attached to the cellular network CAMA agent provides ad hoc nodes information such as authentication, routing support, keys through cellular channel Data transmission uses ad hoc channel
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12 CAMA Environment
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13 Major Ideas Use signals via cellular network for ad hoc routing and security managements Centralized CAMA agent provides control over distributed ad hoc network
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14 CAMA vs. ad hoc network CAMA has advantages over pure ad hoc networks in: Simple network authentication and accounting Routing server for more accurate routing decisions Certification authority for key distribution Central security check point for intrusion detection
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CAMA - Secure communication in cellular and ad hoc...

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