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Topic: Re: HELP:Options on integrating digita signature
Conf: (P-PDF) Developers, Msg: 57232
From: LeonardR
Date: 5/29/2002 05:24 PM

At 5:53 PM -0400 5/23/01, p-pdf-developer Listmanager wrote:
>I am researching on the viability on integrating digital signature
>(biometrics and key) in a Internet application.


>Here is my scenario:
>The user will see in his browser a PDF file where he will have to
>sign using a tablet or pen...
>Our environment is UNIX/Servlet and JAVA. Seems that acrobat is
>heavily based in C++.
>Any hint where to start, architecture, or where to look for
>information is appreciated.
Well, you've got a couple of options that I can see...

1) Requires your users to have the FULL Acrobat, and then write a
plugin for it. The reason that you can NOT use Reader is that you
will be needing to modify the PDF and then send the signed PDF back
to the server, and Reader doesn't support modifying documents.

2) Build your own "mini-Acrobat", where the rasterization of the PDF
document is done on the server (using a 3rd party library like SPDF -, and then xferred to a Java applet running
in the client's browser. Your applet then handles all the user
interaction/signing, etc. and simply returns enough information about
the server so that all signing, PDF modification, etc. actually
happens there.

That's my thoughts....

Leonard Rosenthol
Director of Software Development (215) 922-3509 (voice)
Appligent, Inc. (610) 284-4233 (fax)
(the company formerly known as Digital Applications)

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