"Will" <westes-(E-Mail Removed)> hath wroth:
>"Jeff Liebermann" <(E-Mail Removed)> wrote in message
>news:(E-Mail Removed).. .
>> "Will" <westes-(E-Mail Removed)> hath wroth:
>> >Can someone also explain what are the security implications of using WEP
>> >with "Open System" authentication?
>>
>> Open System authentication is basically no authentication at all.
>> However, shared key authentication makes it fairly easy to extract the
>> WEP key. As the lesser evil, Open System is better. See:
>> | http://www.startawisp.com/content/view/147/83/
>Interesting reading. How easily can they break the WEP key using Open
>System?
I don't know. I've never tried it that way. It sounds fairly easy.
Quoting the above URL:
For shared key authentication, the Access Point (AP) generates
some random string of ASCII, sends it CLEARTEXT to the Station,
the station encrypts it using his configured WEP key, sends it
ENCRYPTED to the AP, and the AP then decrypts it to see if the
starting ASCII string is produced. This is meant to insure both
sides have the same key. The problem is that 2 of 3 parts of the
encryption scheme are sent over the air, and makes it much easier
for a hacker to figure out the WEP key.
So, by sniffing the traffic, I can get the random string directly. I
can also get the encrypted hash code by sniffing. As I vaguely recall
(not sure, might be wrong, too lazy to check), it's not really
"encrypted" but a simple XOR of the ASCII string and the WEP key.
Running another XOR against the hash code should recover the WEP key.
Way too easy.
The program WEPWedgie does a better job by creating customized WEP
packets, cramming them into the wireless traffic, and decrypting the
WEP key from the encrypted results. Also too easy:
http://www.securityfocus.com/infocus/1824
http://sourceforge.net/projects/wepwedgie/
There are some notes on using it for cracking the WEP key using the
shared key authentication exchange. Have fun.
>> The original WG602 does not support WPA, but your V2 version does. Any
>> particular reason why you're using WEP, which is known to be
>> crackable, instead of WPA, with is far more secure?
>
>The client doesn't appear to have any support for WPA.
Ummmm... there are other ways to obtain WPA-PSK client support. Can
you supply some details on the client? Make, model, hardware
mutation, operating system?
--
Jeff Liebermann
(E-Mail Removed)
150 Felker St #D
http://www.LearnByDestroying.com
Santa Cruz CA 95060
http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558