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Re: [PATCHv3] mac80211: dynamic wep

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On Tue, 2007-08-14 at 23:55 -0700, Michael Wu wrote:
> I suspect keyidx > 0 is done to allow hardware 
> without individual WEP key support to continue using hardware WEP.

I've wondered for a long time why Cisco chose to use keyidx>0 for WEP
unicast keys, but I think I finally understand that this is a weird
feature (8.5.1): In a mixed WEP and TKIP network a WEP key[0] would
conflict with the TKIP key (which must have keyidx == 0), forcing a dumb
TKIP STA to downgrade to WEP. (A good TKIP STA would just rely on
per-STA keys and not have this problem)

Volker Braun


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