The only way would be to log into your router itself, and disable all security, meaning the DS doesn't need an encryption key. But that's technically unsafe, and you may as well just keep the router using WEP security and enter the encryption key into the DS.
A WEP key is set on a wireless router its not a code to play on xbox.live.
WEP keys should be changed at least once after initial set up. This is to prevent users from relying on the default password. After that, the password can be changed as often as the user desires.
WEP and WPA protect your information from unauthorized access when you are using your wireless connection. Longer key harder to crack. WEP system is practically dead because of flaws in the encryption mechanism, and basically can be cracked within minutes. WPA is a good choice especially with long keys. If you can, use WPA2-PSK AES. This one is almost impossible to crack.
Wired Equivalent Privacy (WEP) codes are encryption keys used in wireless networks. When configured to use WEP, the network administrator will create a WEP key and then provide it to the network clients. WEP is no longer considered to be secure, and WPA/WPA2 have replaced it in most recent equipment. If you need to access a WEP-encrypted network on your Nintendo DSi, you should talk to whomever owns the network.
A WEP key is entered as a string of numbers and letters and is generally 64 bits or 128 bits long. In some cases, WEP supports 256 bit keys as well. To simplify creating and entering these keys, many devices include a Passphrase option. The passphrase is an easy way to remember the word or phrase used to automatically generate a key.
A WEP key has nothing to do with your DS system but the WEP key is the password that is needed for secured wireless modem networks when you're trying to set up the connection with other devices. Most default WEP keys can be on the router or the modem already but if the key isn't a default one then you'll have to ask whoever set up your modem or Router for the WEP key.
Linksys is a kind of wireless router, and wep keys are different for each router. I sugget going to http://linksysbycisco.com/US/en/support to find out more info about how your router works.
The WEP key is the encryption key used to access the wireless network. The keys are only given to people who the network owner has authorised to use it, so it keeps unauthorised people (ie, you) off it.
Aircrack-ng is the fork of the original Aircrack project. It is a wireless WEP/WPA cracking utility that can recover up to 512-bit WEP keys once enough packets have been gathered.
Check the Linkhttp://en.wikipedia.org/wiki/Wired_Equivalent_Privacy
WEP is a part of 802.11. WEP is not secure because its wickness in the encryption mechanism. Which is used by many wireless network scanners. It takes about 5 minutes to hack WEP. It's highly recommended to use WPA or WPA2-PSK AES over WEP.
WEP has been replaced by WPA.