LEGRAND Wireless access point Configuration Manual page 13

The following section explains more about the weak (64-bit) and strong (128-bit) WEP encryption
methods.
Encryption type:
WEP 64-bit encryption
WEP 64-bit and WEP 40-bit encryption modes are similar and interoperable on the same
wireless network. This level of WEP encryption uses a 40-bit encryption diagram (10
hexadecimal characters) as a secret key configured by the user and a 24-bit "initialization vector"
that is not controlled by the user.
Together, these two elements constitute a 64-bit encryption method (40+24). Certain distributors
refer to this encryption method as either WEP 40-bit or WEP 64-bit encryption.
WEP 128-bit encryption
WEP 104-bit and WEP 128-bit encryption modes are similar and interoperable on the same
wireless network. This level of WEP encryption uses a 104-bit encryption mechanism (26
hexadecimal characters) as a secret key configured by the user and a 24-bit "initialization vector"
that is not controlled by the user.
Together, these two elements constitute a 128-bit encryption method (104+24). Certain
distributors refer to this encryption method as either WEP 104-bit or WEP 128-bit encryption.
Passphrase
Select "WEP 64-bit" or "WEP 128-bit" in the WEP encryption field: The access point automatically
generates four WEP keys. A combination of letters, numbers and/or symbols is required (max. 64
characters). You can also leave this field blank and enter the four WEP keys manually.
WEP 64-bit key: 10 hexadecimal characters (0~9, a~f and A~F)
WEP 128-bit key: 26 hexadecimal characters (0~9, a~f and A~F)
WEP key
You can configure up to four WEP keys. A WEP key can contain either 10 or 26 hexadecimal
characters (0~9, a~f and A~F) depending on whether you select 64-bit or 128-bit encryption in
the WEP dropdown menu. The Legrand 802.11g access point and ALL clients connecting to it
MUST have at least the same default key.
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Key index:
The default key field allows you to specify which of the four encryption keys is to be used to
transmit data over the local wireless network. As long as the Legrand access point and the
mobile wireless client used to communicate have the same keys in the same positions, you can
use any of the four keys as the default key.
If the Legrand access point and ALL its wireless clients use the same four WEP keys, select key
rotation for more security. Otherwise, choose a shared key to be a default key.
Frequency of refresh of network key
This field indicates the time interval (in seconds) between two renewals of the WPA group key.
Enter zero (0) to indicate that no periodical renewal is required.