How many bits = 64?

Ok daft question...

The manual for my WLAN card says enter a 10 digit Hex number for 64 bit WEP.

In my day a hex digit was 4 bits and represented numbers (0-F) so 10 x 4 =
40 bits not 64... or am I missing something?

--
Delete BOX to get my real email address

"CWatters" <(E-Mail Removed)> wrote in message
news:GpCbb.33722$(E-Mail Removed)
>
> The manual for my WLAN card says enter a 10 digit Hex number for 64
> bit WEP.
>
> In my day a hex digit was 4 bits and represented numbers (0-F) so 10
> x 4 = 40 bits not 64... or am I missing something?

You're missing something.

The other bits are used for protocol overhead.

--
John T
http://tknowlogy.com/tknoFlyer
__________

A 64 bit WEP key is made up of a static 40 bit key (which you specified) + a
24 bit initialisation vector which is generated at random for each frame.
This is why you are only allowed to specify 40 bits or 10 hex.

"CWatters" <(E-Mail Removed)> wrote in message
news:GpCbb.33722$(E-Mail Removed)...
> Ok daft question...
>
> The manual for my WLAN card says enter a 10 digit Hex number for 64 bit
WEP.
>
> In my day a hex digit was 4 bits and represented numbers (0-F) so 10 x 4 =
> 40 bits not 64... or am I missing something?
>
> --
> Delete BOX to get my real email address
>
>

In message <GpCbb.33722$(E-Mail Removed)>, CWatters
<(E-Mail Removed)> writes
>Ok daft question...
>
>The manual for my WLAN card says enter a 10 digit Hex number for 64 bit WEP.
>
>In my day a hex digit was 4 bits and represented numbers (0-F) so 10 x 4 =
>40 bits not 64... or am I missing something?

An additional 24 factory-set bits are added to the 40-bit input to
generate the 64-bit encryption key. The 24 factory-set bits are not
user-configurable.

802.11b products, BTW, typically support four WEP keys, but some
manufacturers support only one key. We should therefore ensure that both
our 802.11b access and client adapters' configurations match.
--
Tony Morgan
Smile in the face of adversity - and adversity will probably
think you're taking the piss and kick the shit out of you.

Tony Morgan <(E-Mail Removed)> writes:

> 802.11b products, BTW, typically support four WEP keys, [...]

Would this be (any of) all four keys at the same time, or are
you locked into just one until you physically change it in some
configuration menu ??

Billy Y..

On Mon, 22 Sep 2003, CWatters wrote:
> Ok daft question...
>
> The manual for my WLAN card says enter a 10 digit Hex number for 64 bit WEP.
>
> In my day a hex digit was 4 bits and represented numbers (0-F) so 10 x 4 =
> 40 bits not 64... or am I missing something?

Title question: One more than 63. Duh.

Posted question: 40 one enters, plus 24 that it uses (LSH of its ethernet
address?) internally makes 64.


[LSH = Lesser Significant Half]

Absurd answer. You are a skilled practitioner of the fine art of
bullshitting.

"John T" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) ws.com...
> "CWatters" <(E-Mail Removed)> wrote in message
> news:GpCbb.33722$(E-Mail Removed)
> >
> > The manual for my WLAN card says enter a 10 digit Hex number for 64
> > bit WEP.
> >
> > In my day a hex digit was 4 bits and represented numbers (0-F) so 10
> > x 4 = 40 bits not 64... or am I missing something?
>
> You're missing something.
>
> The other bits are used for protocol overhead.
>
> --
> John T
> http://tknowlogy.com/tknoFlyer
> __________
>
>
>

The additional 24 bits are not factory preset, they are generated at at
random for each ip datagram and included in each 802.11x frame.

"Tony Morgan" <(E-Mail Removed)> wrote in message
news:e10uZFCZ7yb$(E-Mail Removed)...
> In message <GpCbb.33722$(E-Mail Removed)>, CWatters
> <(E-Mail Removed)> writes
> >Ok daft question...
> >
> >The manual for my WLAN card says enter a 10 digit Hex number for 64 bit
WEP.
> >
> >In my day a hex digit was 4 bits and represented numbers (0-F) so 10 x 4
=
> >40 bits not 64... or am I missing something?
>
> An additional 24 factory-set bits are added to the 40-bit input to
> generate the 64-bit encryption key. The 24 factory-set bits are not
> user-configurable.
>
> 802.11b products, BTW, typically support four WEP keys, but some
> manufacturers support only one key. We should therefore ensure that both
> our 802.11b access and client adapters' configurations match.
> --
> Tony Morgan
> Smile in the face of adversity - and adversity will probably
> think you're taking the piss and kick the shit out of you.

>
> Title question: One more than 63. Duh.
>
> Posted question: 40 one enters, plus 24 that it uses (LSH of its ethernet
> address?) internally makes 64.
>
>
> [LSH = Lesser Significant Half]

Duh! yourself! Read the doco on WEP.

"Selar Rao" <(E-Mail Removed)> wrote in message
news:88Ubb.118229$(E-Mail Removed)
>
> The additional 24 bits are not factory preset, they are generated at
> at random for each ip datagram and included in each 802.11x frame.

Just out of curiosity, how is that not part of the protocol?

--
John T
_______________