Encrypt/decrypt automatically with PHP PDF document via Client CA

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  • Steph
    #1

    Encrypt/decrypt automatically with PHP PDF document via Client CA

    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


    Tags: None
    • Jerry Stuckle
      #2
      Re: Encrypt/decrypt automatically with PHP PDF document via ClientCA

      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.

      --
      =============== ===
      Remove the "x" from my email address
      Jerry Stuckle
      JDS Computer Training Corp.
      jstucklex@attgl obal.net
      =============== ===

        Comment

        • NC
          #3
          Re: Encrypt/decrypt automatically with PHP PDF document via Client CA

          On Apr 16, 3:49 pm, "Steph" <mcv...@hotmail .comwrote:
          >
          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.
          You are going about it in a wrong way. Instead of encrypting PDF, you
          should produce an e-book. Although e-books are not exactly hacker-
          proof, either...

          Cheers,
          NC

            Comment

            • Steph
              #4
              Re: Encrypt/decrypt automatically with PHP PDF document via Client CA


              "NC" <nc@iname.com a écrit dans le message de news:
              1176784028.7892 16.123010@p77g2 00...legr oups.com...
              On Apr 16, 3:49 pm, "Steph" <mcv...@hotmail .comwrote:
              >>
              >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.
              >
              You are going about it in a wrong way. Instead of encrypting PDF, you
              should produce an e-book. Although e-books are not exactly hacker-
              proof, either...
              >
              Cheers,
              NC
              >
              Do you have a recommandation about what e-book to use ?
              I'm not very familiar about it


                Comment

                • Steph
                  #5
                  Re: Encrypt/decrypt automatically with PHP PDF document via Client CA


                  "Jerry Stuckle" <jstucklex@attg lobal.neta écrit dans le message de news:
                  ZpydndHdq9ZNhbn bnZ2dnUVZ_oHinZ 2d@comcast.com...
                  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.
                  >
                  --
                  =============== ===
                  Remove the "x" from my email address
                  Jerry Stuckle
                  JDS Computer Training Corp.
                  jstucklex@attgl obal.net
                  =============== ===
                  Thanks for your advice !


                    Comment

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