28-01-2011, 03:25 PM
David Wagner University of California at Berkeley
Wireless Networking is Here
802.11 wireless networking is on the rise
installed base: ~ 15 million users
currently a $1 billion/year industry
The Problem: Security
Wireless networking is just radio communications
Hence anyone with a radio can eavesdrop, inject traffic
WEP
The industry’s solution: WEP (Wired Equivalent Privacy)
Share a single cryptographic key among all devices
Encrypt all packets sent over the air, using the shared key
Use a checksum to prevent injection of spoofed packets
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