Worried about Wi-Fi security? You should be.
 

Even for IT professional Matthew Ingrassia, keeping a home Wi-Fi network safe from outside threats is close to a full-time undertaking.

The technical coordinator for Washington, D.C.-based law firm Thompson Coburn harbors apprehensions that someone may be able to infiltrate the wireless network he set up in his Maryland home, despite all the training he brought to it. And he's pretty sure there are a lot of less-experienced people out there with no clue just how vulnerable their wireless systems may be.

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