Re: Dynamic WEP for each STA

From: Jouni Malinen (
Date: 2002-04-05 10:21:32 UTC

On Fri, Apr 05, 2002 at 05:14:49PM +0800, Lei chuanhua wrote:

> Yes, I think you can implement WEP in hostap driver. It is
> impossible to use differet WEP keys for each STA. But you can use
> four different WEP keys at most if you implement WEP in hostap
> driver.

Impossible? If WEP is implemented in the host driver (which seems to be required to get it really working in Host AP mode), the driver can store different keys for each station. When encrypting/decrypting frames, the driver knows which station is in question and can thus use the proper key. I see no problem in using different keys for each station in host driver based WEP implementation.

> I have implemented access control by combining MAC address
> and WEP. I can use four different groups, and every group can use
> different WEP key.

Do you mean that you have implemented WEP in Host AP driver? Sometime in the future, after finishing N+1 other things first ;-), I'm going to implement generic host driver based encryption/decryption (generic in sense, that it can use different crypto algorithms that are loaded as separate kernel modules). Any host driver WEP implementation would be useful background information for this.

Jouni Malinen                                            PGP id EFC895FA

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