cse443-lecture-29-wireless

cse443-lecture-29-wireless - Wireless Security CSE497b...

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CSE497b Introduction to Computer and Network Security - Spring 2007 - Professor Jaeger Wireless Security CSE497b - Spring 2007 Introduction Computer and Network Security Professor Jaeger www.cse.psu.edu/~tjae ger/cse497b-s07/
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CSE497b Introduction to Computer and Network Security - Spring 2007 - Professor Jaeger At the mall ... Page 2
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CSE497b Introduction to Computer and Network Security - Spring 2007 - Professor Jaeger Wireless Networks Network supported by radio communications .. Alphabet soup of standards, most on 802.11 .. destroys the illusion of a hard perimeter. Page 3
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CSE497b Introduction to Computer and Network Security - Spring 2007 - Professor Jaeger Why you should fear Simon Byers ... Over the course of history radio frequencies have been enormously vulnerable to eavesdropping and manipulation. ASSUME: Everything you say on a wireless network is going to be heard and potentially manipulated by your adversaries. Page 4
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CSE497b Introduction to Computer and Network Security - Spring 2007 - Professor Jaeger Wireless LANs Access point networks (ranging to about 300 feet) All devices connect to the central access point Pro: very easy to setup and maintain, simple protocols Con: reliability/speed drops as you get away from AP or contention increases. Page 5
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CSE497b Introduction to Computer and Network Security - Spring 2007 - Professor Jaeger Ad hoc Networks (a.k.a peer-to-peer) Devices collaboratively work together to support network communication Network topology changes in response to moving devices, e.g., bluetooth Pro: highly flexible and responsive to changes in environment Con: complex, subject to traffic manipulation by malicious peers Page 6
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CSE497b Introduction to Computer and Network Security - Spring 2007 - Professor Jaeger Devices Laptops (canonical wireless devices) Desktops, mobile phones, .... • Bluetooth Page 7
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CSE497b Introduction to Computer and Network Security - Spring 2007 - Professor Jaeger Attacks on Wireless Networks • DOS Planted devices Hijacked connections • Eavesdropping Somebody is "in the wire" ...
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