What are the differences between 40-, 64-, and 128-bit WEP keys?
64-bit WEP is the same as 40-bit WEP. The lower level of WEP encryption uses a 40-bit (10 hex character) “secret key” (set by the user), and a 24-bit “initialization vector” (not under user control). Some vendors refer to this level of WEP as 40-bit, others as 64-bit. Either way, they’re the same encryption level and can interoperate. The higher level of WEP encryption, commonly referred to as 128-bit WEP, actually uses a 104-bit (26 hex character) “secret key” (set by the user), and a 24-bit “initialization vector” (not under user control).
