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Thorsten Tarrach Guest
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Posted: Tue Jul 15, 2008 5:22 pm Post subject: WPA2-PSK safty |
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Hi,
I'm wondering about WPA2 safety in the scenario of a preshared key (PSK).
I'm aware that the protocol is safe by today's knowledge if they key is kept
secure.
But what if I share the key with another person to enable that person to use
my AP. Will that break confidentiality of my communication with the AP?
The AES encryption key is derived from the PSK in some form of handshake. I
want to know now if someone else can obtain that key by capturing the
handshake and knowing the PSK?
Thanks, Thorsten |
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Keith Guest
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Posted: Tue Jul 15, 2008 8:22 pm Post subject: Re: WPA2-PSK safty |
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Thorsten Tarrach wrote:
| Quote: |
I'm wondering about WPA2 safety in the scenario of a preshared key
(PSK). I'm aware that the protocol is safe by today's knowledge if they
key is kept secure.
But what if I share the key with another person to enable that person to
use my AP. Will that break confidentiality of my communication with the AP?
The AES encryption key is derived from the PSK in some form of
handshake. I want to know now if someone else can obtain that key by
capturing the handshake and knowing the PSK?
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That's a very good question, and one for which you can get a pretty
definitive answer from the good people at sci.crypt.
My own gut feeling is that if they sniff your handshake packets AND they
have the PSK, they can decrypt the random session key, but I may well be
talking balls. You need to ask the professionals. |
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