Questions tagged [tkip]

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Does WPA2 use TKIP or not?

I am writing my master's thesis about WLANs, and there is something what I don't really understand. This may be a dumb question but I didn't find a clear explanation. WPA uses encryption TKIP. WPA2 ...
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0answers
26 views

Algorithm that change keys in TKIP

I know that WEP has been replaced by TKIP. TKIP still uses RC4, but in it the Initialization Vector (IV) is longer and it's used with the MAC of the sender and a hardcoded WEP key to generate the key ...
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0answers
29 views

Attacking TKIP Group Shared traffic

I am aware of two attacks against TKIP/RC4 encrypted traffic: Beck-Tews attack Ohigashi-Morii attack If I have a network that uses TKIP for the Group Cipher, i.e. multicast and broadcast traffic, ...
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1answer
1k views

WPA2 and ChopChop attack

I know that WEP is vulnerable to the ChopChop attack. Could the ChopChop attack be carried against WPA2-PSK as well? Some Internet articles suggest this possibility, I want to be sure though.
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0answers
144 views

Is the keystream recovered by tkiptun-ng the same key used to encrypt all data frames between the client and the AP?

Looking at the manual for tkiptun-ng,(http://www.aircrack-ng.org/doku.php?id=tkiptun-ng) The output saves the keystream in the example near the end of the program. Is this the same keystream used to ...
2
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1answer
805 views

TKIP key length and initialization vector size

It's not clear to me from reading the wiki if TKIP encryption uses a 128 bit RC4 encryption key and a 48 bit IV, or if the 128 bit is the total, and the actual key size is 128 - 48 = 80 bit.
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2answers
1k views

How is TSC (TKIP sequence counter) calculated, in WPA?

I'm reading about 802.11, from IEEE's PDF, from page 1191, and in particularly I'm reading about TKIP. To decrypt and encrypt, you use a TSC (TKIP Sequence Counter) as you can see in these images: ...