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P-660HW-Tx v2 Series Support Notes
String" passed through the WEP encryption algorithm. Access is denied by
anyone who does not have an assigned key. WEP comes in 40/64-bit and
128-bit encryption key lengths. Note, WEP has shown to have fundamental
flaws in its key generation processing.
3. What is WPA?
Wi-Fi Protected Access (WPA) is a subset of the IEEE 802.11i security
specification draft. Key differences between WAP and WEP are user
authentication and improved data encryption. WAP applies IEEE 802.1x
Extensible Authentication Protocol (EAP) to authenticate wireless clients using
an external RADIUS database. You can not use the P-660HW-Tx v2's local
user database for WPA authentication purpose since the local user database
uses MD5 EAP which can not to generate keys.
WPA improves data encryption by using Temporal Key Integrity Protocol
(TKIP), Message Integrity Check and IEEE 802.1x. Temporal Key Integrity
Protocol uses 128-bits keys that are dynamically generated and distributed by
the authentication server. It includes a per-packet key mixing function, a
Message Integrity Check (MIC) named Michael, an extend initialization vector
(IV) with sequencing rules and a re-keying mechanism.
If you do not have an external RADIUS server, you should use WPA-PSK
(WPA Pre-Share Key) that only requires a single (identical) password entered
into each access point, wireless gateway and wireless client. As long as the
passwords match, a client will be granted access to a WLAN. You can refer to
the User Guide for more information about it.
4. What is the difference between 40-bit and 64-bit WEP?
40 bit WEP and 64 bit WEP are the same encryption level and can interoperate.
The lower level of WEP encryption uses a 40 bit (10 Hex character) as "secret
key" (set by user), and a 24 bit "Initialization Vector" (not under user control)
(40+24=64). Some vendors refer to this level of WEP as 40 bit, others as 64
bit.
5. What is a WEP key?
A WEP key is a user defined string of characters used to encrypt and decrypt
data.
6. Will 128-bit WEP communicate with 64-bit WEP?
No. 128-bit WEP will not communicate with 64-bit WEP. Although 128 bit WEP
also uses a 24 bit Initialization Vector, but it uses a 104 bit as secret key. Users
need to use the same encryption level in order to make a connection.
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All contents copyright © 2006 ZyXEL Communications Corporation.
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