In this particular case I would send a link with a unique string attached 
that can be linked to that customer's account. When they use that link it 
will present them with a page allowing them to download their selection, and 
then limit the number of times they can download the file (3-5 is the norm 
from what I've seen). This way if the link does get passed around only two 
other people might get it and the person who bought it won't have a way to 
download a backup copy. Some sites go as far as generating a seperate 
username and password for each download and then display that on the 
download page. 
Hope this helps out.
-Jason

On 7/13/05, Cash Only <[EMAIL PROTECTED]> wrote:
> 
> I'm doing it for security reasons.
> 
> I want to put educational material that I sell on that page, but
> don't want the link to be passed around to others, because then
> there would be no incentive for them to buy.
> 
> THanks,
> 
> Cash
> 
> 
> --- In [email protected], Jason Burris <[EMAIL PROTECTED]>
> wrote:
> > Are you limiting the link because of security reasons or just for
> > verification against bots?
> >
> > Without knowing what the application is for the one time link it's
> hard to
> > give the best advice. What I can say is several sights will send a
> link with
> > a generated number in it. That link will bring up a page where the
> email
> > recipient will have to verify their email address. You could also
> set the
> > link to only work for 24 hours and a 1 time use.
> >
> > You could try the IP method, but if someone is using a proxy,
> there is a
> > chance that the IP they come from initially won't be the same as
> the one
> > they use for the link.
> >
> > -Jason
> >
> > On 7/10/05, Cash Only <[EMAIL PROTECTED]> wrote:
> > >
> > > Hi,
> > >
> > > I am looking for a way to send someone an e-mail with a link
> that only
> > > they can use it it not be passed around to others. Like maybe it
> > > would be for one-time use only or restricted to their IP address
> (or
> > > the first IP address that accesses it). Any suggestions on how
> this
> > > might be accomplished?
> > >
> > > Thanks,
> > >
> > > Cash
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
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> > > Yahoo! Groups Links
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> >
> >
> > [Non-text portions of this message have been removed]
> 
> 
> 
> 
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> 
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>


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