Joyce --

I doubt anybody here is going to help you break the law and hack into encrypted WiFi access points. If you want to do that, you're on your own.

If your workplace doesn't have a problem with you using their network with the device, then they shouldn't have much issue with helping you set up a WiFi AP at your office (encrypted, hopefully with WPA not WEP) to use with your device on their network. The IT guy you spoke with at work should be able to help you get an inexpensive wireless router/access point configured and installed on their network.

Good luck.