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Check the Linkhttp://en.wikipedia.org/wiki/Wired_Equivalent_Privacy
That'll be someone's own personal, private router. If you don't know the WEP key, you almost surely aren't authorised to access it.
You need to ask the owner of the router.
The WEP key is the same one your PC or laptop uses to access your wireless router. If you don't have a wireless router, then you're looking at someone else's, the WEP key is actually there to stop unauthorised people like you from accessing it.
The WEP key is the same one as the one your PC uses to connect to your wireless router, just enter that. If you're seeing someone else's router, then you don't need a WEP key because you shouldn't be connecting to it anyway.
That doesn't technically make sense - a WEP key is the password used to access an encrypted (one form of encryption at least) router. If you don't have a router, it makes no sense to ask for a WEP key - a WEP key to access what? It's like a key with no lock, the WEP key is for a router.So if there's no router, there's no point wanting a WEP key. If there is a router and you don't know the WEP key, then clearly it's someone else's router, and the encryption is precisely to stop unauthorised people using it.
People outside your home (but within range of your router) could use your wireless internet, if they knew your WEP key. However if you don't give anyone your WEP key, they would be unable to access your router.
You may enhance the sercurity to wep, wpa2.. etc.
You just give the WEP/WPA key to whoever wants access.
WEP has been replaced by WPA.
if you mean for a wifi signal that's someone wifi and he doesn't one anyone to connect to it except for him, the only way you can get the wep key is to ask for the guy that own the wifi signal.
Wired Equivalent Privacy (WEP)