The safest computer network in the world is one that is air gapped. This means it isn't connected to any other network or the Internet. Doesn't work well with todays computer users needs but it is the most secure. Wireless Networks are the opposite of this they are basically radio stations broadcasting internet connectivity and packets of data instead of music. 802.11 also known as WiFi is virtually impossible to 100% truly secure and should probably be banned for HIPPA compliance or any network having anything to do with Credit Card Processing taking place over it. Until 802.11i comes out it should be too. 802.11i will add security extensions to the protocol but its not here yet.

Even if your using WEP: Wireless Equiliency Protocol, LEAP: Lightweight Encrypted Authentication Protocol, WPA: Wi-Fi Protected Access or WPA2 over an encrypted connection with HTTPS: encrypted http, SSH: encrypted remote shells, and encrypted mail procotols POP3S: encrypted pop3, IMAPS: encrypted imap and ESMTP W/SSL: extended simple mail transport protocol over secure sockets layer you are doing so it open view of everyone and in the least it can all be recorded just like a radio station broadcast and have serious processing power played out against it as they attempt to crack your keys later.

While wireless may be appropriate for home use, its use in business's should really need business justification. If it is used, it should be on its own subnet of a network and firewalled off as hostile to the rest of the internal network to further minimize exposure. Accessing business networks through applications such as pcAnywhere via a wireless home network is again risky behavior. Remember, users are usually the weakest link in computer networks.

Wifi is everywhere and its handy but care should be exercised to make sure the network communication is all encrypted with the highest level of encryption possible for your setting.