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Chapter 5
Expert Configuration
E-DOC-CTC-20050429-0104 v1.0
164
WEP The Wired Equivalent Privacy (WEP) algorithm is used to protect wireless
communication from eavesdropping.
WEP relies on a secret key that is shared between the wireless client (e.g. a laptop
with a wireless ethernet card and the SpeedTouch™. The fixed secret key is used to
encrypt packets before they are transmitted. I.e. during transmission between client
and AP ("in the air") the information in the packets is encrypted
To enable level1 - WEP:
1 Select Security Level 1 - WEP.
2 In the Type list, click the desired Data Security level (either 64-bit or 128-bit
and Alphanumeric or Hexadecimal).
3 In the Encryption key box, type a Network key of your choice. In case of:
64 bits, Alphanumeric:
The 40-bits Network key must consist of 5 alphanumeric characters.
64 bits, Hexadecimal:
The 40-bits Network key must consist of 10 hexadecimal digits.
128 bits, Alphanumeric:
The 104-bits Network key consists of 13 alphanumeric characters.
128 bits, Hexadecimal:
The 104-bits Network key consists of 26 hexadecimal digits.
4 Click Apply to immediately apply your changes.
WPA-PSK The SpeedTouch™ supports WPA-PSK which has 3 improvements regarding to WEP:
Authentication via a 4-way handshake to check whether the Pre-Shared Keys
(PSKs) are the same.
Stronger encryption types:
Temporal Key Integrity Protocol (TKIP) (default): Instead of using a
fixed WEP key, TKIP uses in pairs temporary session keys which are
derived from the PSK during the 4-way handshake. For each packet
it uses a different key. TKIP also provides a message integrity check
(MIC) and a rekeying mechanism (in seconds).
Advanced Encryption Standard (AES): State-of-the-art encryption;
can only be used if all wireless devices in your WLAN support AES.
Message Integrity Check (MIC), which is a strong mathematical function in
which the recipient and transmitter each compute and compare the MIC. If they
don't match it is assumed that a third person has been trying to read the data.
To enable level2 - WPA-PSK:
1 Select Security Level 2 - WPA-PSK (WPA Personal).
2 In the WPA passphrase box, type a passphrase (aka Pre-shared key) of your
choice. The passphrase must consist of 8 to 63 ASCII characters or 64 HEX
digits.
3 In the Encryption list, click the desired Encryption method (either TKIP or AES).
4 Optionally select the rekeying interval.
5 Click Apply to immediately apply your changes.
AES is not yet implemented in most clients but AES is implemented in
the SpeedTouch™ because it will be the future security standard.