WPA vs. WEP Encryption
What is the most secure method of encryption, between WEP and WPA, for a wireless router and why?
Common routers support WEP encryption at different levels 64 bit (being the bare minimum), 128 bit (being a median), and 256 bit (being overkill). While 64 bit WEP encryption is better than nothing, it isn't much better. A hacker could very easily penetrate a system using such an encryption using tools commonly available for free online. WEP encryption at the 128 bit level is somewhat better, but can still be easily cracked. WEP 256 bit offers decent security, but can cause unacceptable lag, and can still be cracked by someone.
WPA, however, is a much more secure method of encryption. It handles payload integrity much better than WEP, as well as provides a more potent cipher. Most newer routers now support WPA2, an even more secure version of WPA, which eliminates a problematic integrity checker that was used in the first version for backwards compatibility with older network cards.
WPA is the preferred method of authentication whenever possible. But, if it is not an option on your router, WEP is better than nothing just keep in mind your data is not very secure.