Use encryption

Encryption is the number one security measure, but many wireless access points (WAPs) don't have encryption enabled by default. Although most WAPs support the Wired Equivalent Privacy (WEP) protocol, it's not enabled by default. WEP has a number of security flaws, and a knowledgeable hacker can crack it, but it's better than no encryption at all. Be sure to set the WEP authentication method for "shared key" rather than "open system". The latter does not encrypt the data; it only authenticates the client. Change the WEP key frequently and use 128-bit WEP rather than 40-bit.