On 24 Aug 2005 13:40:23 -0700, "Eugene F." <firstname.lastname@example.org> wrote:
>Is my understanding correct that pure 802.11b cards are supposed to
>support WEP and not WAP encryptions?
Wrongo. I think you mean WPA. There's nothing inherent in 802.11b
that will prevent implementing WPA.
WPA encryption was designed to act as a temporary fix for the key
exchange problems in WEP. It's primary design criteria is that it
involved no hardware changes and minimal software changes. In theory,
every card going back to the stone age of wireless that can do WEP
should be able to also do WPA. The problem is that many vendors do
not find it profitable to update firmware and drivers for cards they
are no longer selling. Therefore, you should be able to get WPA on
any currently sold devices, but will probably have trouble finding
native WPA drivers for older cards.
There's also the problem of memory space on older cards. WPA requires
802.1x authentication which may not fit in the memory space available
in older cards.
In addition, note that there's no requirement that WPA be implemented
in the card driver. There are various external programs that
implement WPA including Wireless Zero Config for XP.
"David Taylor" <email@example.com> wrote in message
> > Is my understanding correct that pure 802.11b cards are supposed to
> > support WEP and not WAP encryptions?
> It's a firmware update to WPA (Presuming you meant WPA and not WAP).
TKIP is the key exchange mechanism used in WPA to replace the insecure
method used in WEP.
The 1.52.02 version of the BEFW11S4v4 firmware only supports TKIP key
exchange. Although it's listed as an option, TKIP is the only choice.
For a home system, I suggest you use WPA-PSK (pre-shared key) as
anything else requires a RADIUS server for the 802.1x authentication.
On Thu, 25 Aug 2005 20:41:59 -0400, "E.F." <firstname.lastname@example.org> wrote:
><<< For a home system, I suggest you use WPA-PSK (pre-shared key) ... >>>
>What is the relationship between TKIP (that my hardware/drivers supposedly
>have) and WPA-PSK?
>I read http://en.wikipedia.org/wiki/Wi-Fi_Protected_Access but still not
Well, I don't know if I can simplify the various protocols but I'll
802.11 is nothing more than encapsulated ethernet (802.3) packets.
Under the 802.11 stuff is just plain old ethernet.
Everything is wireless is bridging with no IP addresses or routing
WPA is a collection of protocols that defines how encryption takes
place over 802.11 wireless.
WPA requires 3 underlying protocols:
1. A method of encryption which is usually RC4 cypher but can also be
AES which is used in WPA2.
2. A method of secure encryption key exchange which is TKIP.
3. A method of authentication which is EAP and PEAP plus assorted
mutations. Normally, these are based on 802.1x authentication which
requires a RADIUS server somewhere.
For home use, the RADIUS server for authentication is impractical so
WPA-PSK (pre-shared key) was invented. The pre-shared key is used for
both encryption and authentication.