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Using Wi-Fi? Firesheep may endanger your security"Most internet users hear -- and dismiss -- warnings about security problems on open Wi-Fi networks. The advent of Firesheep, coupled with the booming popularity of account-based online services such as Twitter, means that no one can afford to continue to ignore online security."
http://edition.cnn.com/2010/TECH/mobile/11/01/firesheep.wifi.security/***