Mark--

I stand corrected.  Seems like a security issue that should be
addressed in dated address generation.  

  --Brian

On Thu, Oct 21, 2004 at 04:32:52PM -0400, Mark Horn wrote:
> On Thu, Oct 21, 2004 at 02:10:02PM -0500, Brian wrote:
> > I believe dated addresses contain a hash generated using your
> > crypt_key, as well as the sender e-mail address and date.  
> 
> No, they don't.  The hash in a dated adress is calculated using
> crypt_key and the dated portion of the address only.  Everything else
> is ignored.  E.g.:
> 
>       $ tmda-address -d 
>       [EMAIL PROTECTED]
>       $ tmda-check-address [EMAIL PROTECTED]
>       STATUS: VALID
>       EXPIRES: Thu Oct 21 20:29:29 2004 UTC
>       $ tmda-check-address [EMAIL PROTECTED]
>       STATUS: VALID
>       EXPIRES: Thu Oct 21 20:29:29 2004 UTC
> 
> So if I share my crypt_key with my son, the first example
> demonstrates how you'd use one of my dated addresses to send
> email to my son.  (Assuming of course, that his email address is
> [EMAIL PROTECTED] - which it isn't.)
> 
> The second example is simply there to demonstrate that the only
> portion of the email address that the hash uses is the date.
> 
> Cheers,
> - Mark
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