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Posted by Jerry Stuckle on 04/17/07 01:46
Steph wrote:
> Hi Everybody,
>
> Does anybody know whether it is possible to encrypt AUTOMATICALLY in PHP
> (at the server side) an Adobe PDF document (also stored at the server side)
> by using a public key coming from a certificat of the client that want to
> retreive, decrypt (with his private key) and read the PDF document ?
>
> I would like to distribute PDF document to certified clients for which they
> could only read the document on their PC that owns the certificat
> (public/private keys) that has been used to encrypt the document at the
> server side and allow to decrypt it at the client side.
>
> Many thanks in advance for you help
>
> Steph
>
>
Forget it. Most clients don't have certificates, and even if they did,
they could copy the certificate to another machine.
If it were that easy we wouldn't have the problem with piracy (both
software and entertainment) that exists in the world today.
The fact is - once I download your PDF, I can pretty much do as I please
with it. If you don't want others to have it, don't distribute it.
--
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Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex@attglobal.net
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