need Wifi in business

[Matty G]

Hey all. I have a friend that owns an up-and-coming bar. He is weary about putting Wifi in the building because he thinks that someone could hack into his office computer. Can anyone tell me what he needs to start getting wifi in the building with the most secure access? He suggests that he can probably tap into an existing router that is used for office PC's and credit card machines.
:confused:
Thanks for any help!
Matty

[M/Q]

Is the wireless network for himself or the customers?