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RE: Which comes first?



The cipher key alsways gets the first <x> number of bits, where <x>
represents the number of bits for its key.

This is stated in other ESP cipher algorithm documents, but it also
should be stated in the main ESP document as well.


On Monday, September 15, 1997 2:42 AM, Ben Rogers [SMTP:ben@ascend.com]
wrote:
> 
> When I negotiate an ESP SA with DES encryption and an MD5 HMAC, I
> obviously need 64 + 128 = 196 bits of keying material from Oakley.  I
> can't seem to find a reference as to which 64 bits are used for the DES
> key and which for the MD5 key.
> 
> Can anyone give me a pointer?
> 
> 
> Thanks,
> 
> ben
>