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Security within the Wireless LAN
39
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AirLancer
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EN
WEP encryption requires calculating time in the Wireless LAN devices and
can slightly impair the data transfer rate.
7.3.2
Tipps for handling keys
The security of encryption procedures can be substantially increased the by
paying attention to some important rules for handling keys.
•
Keep keys as secret as possible.
Never note a key. Popular, but completely unsuitable are for example:
notebooks, wallets and text files in PCs. Do not share a key unnecessar-
ily.
•
Select a random key.
Use randomized keys of character and number sequences. Keys from the
general linguistic usage are insecure.
•
Change your key regularly.
Keys are to be exchanged as frequently as possible. That is a laborious
task but you increase the security in a considerable way. In infrastructure
networks you have the possibility to change keys smoothly (see ’Sliding
key change’ on page 29).
•
Change a key immediately in case of suspicion.
It is time to change the key of the Wireless LAN if an employee with
access to a key leaves your company. The key should also be renewed in
case of smallest suspicion of a leak.
7.3.3
The ways you can increase the security additionally
With WEP it will be difficult for external persons without knowledge of the
keys to receive access to transferred data. Although WEP offers in the very
most cases a sufficient level of data security, in practice there is a limit for
each technology.
Therefore it may be useful to take additional security technologies on higher
protocol level. Modern IPSec products (on level 3 of the OSI model) make pos-
sible a separate protection of users within the Wireless LAN and facilitate
the administration by an automatic key management. Something similar app-
lies to SSL, PGP and S/MIME for example, products which work on applica-
tion level.
Summary of Contents for AirLancer MC-54
Page 1: ... 1 AirLancer EN AirLancer TM MC 54 AirLancer TM PCI 54 ...
Page 14: ...Introduction AirLancer 14 EN ...
Page 18: ...AirLancer MC 54 AirLancer 18 EN ...
Page 30: ...The AirLancer Client Manager AirLancer 30 EN ...
Page 34: ...Configuration example AirLancer 34 EN ...
Page 47: ... Appendix 47 AirLancer EN ...