Re: WEP - Issue with Bcast/Mcast WEP ??

From: Jouni Malinen (
Date: 2002-08-24 08:03:56 UTC

On Wed, Aug 21, 2002 at 06:48:55AM -0700, R Selvaraj wrote:

> I'm unaware of any issue behind transmitting broadcast/multicast frames regarding WEP. Could u pls let me know why broadcast/multicast frames may need to be send un-encrypted. According to the IEEE 802.11b (Page 67)any encrypted data packet will be decrypted based on the keyId of the IV field. So if both Station and AP have same four keys then I guess there wont be any issue.

Please do not take this out of its context.. The question was about using simultaneously stations that use and do not use WEP. In other words, some stations do not have WEP configured at all and the AP has to send broadcast frames in plaintext to get them to these stations. If all the stations are using WEP, then there would not be this kind of issue.

Jouni Malinen                                            PGP id EFC895FA

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