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Hello, i need to add a digital signature to a pdf file and then encrypt it. This procedure has to be done with .net in memory (no uncrypted file should be on the harddrive).

How can i add the signature to a PDF-File and "attach" it into the file with chilkat ? i don't have use a detached signature file... :(

Thanks in advance.

asked Feb 16 '13 at 07:23

EvilOrange's gravatar image

EvilOrange
1112

edited Feb 16 '13 at 09:26


You would need something that is capable of handling the PDF format, because a signed PDF is such that the signature is embedded within the PDF and is part of the PDF format itself.

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answered Feb 18 '13 at 08:51

chilkat's gravatar image

chilkat ♦♦
11.8k316358421

Ok, when is chilkat-pdf coming ??? ;)

I still Need to do that and don't know how :(

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answered Feb 19 '13 at 01:31

EvilOrange's gravatar image

EvilOrange
1112

There are a lot of PDF libraries out there that are designed to handle the intricacies of the format. I use QuickPDF, and I've found it to be a great product, but I recommend that you do your homework and choose the library that's the best fit for your requirements.

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answered Feb 19 '13 at 10:39

jpbro's gravatar image

jpbro ♦
1.1k2618

Tranks for the tip, i will try it...

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answered Mar 13 '13 at 07:47

EvilOrange's gravatar image

EvilOrange
1112

Hi,i'd like to suggest you to insert your signature to pdf files and then encrypt it.There is a.NET software which offers to add & insert an empty page into an existing PDF document file. Besides, this PDF document page inserting library control toolkit allows developers to specify where they want to insert PDF in C# .NET class code.

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answered Sep 04 '13 at 03:12

Abigail111's gravatar image

Abigail111
1

Take a look at iTextSharp. I use it for other PDF work, but it can handle digital signing as well.

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answered Sep 04 '13 at 05:24

roan98dk's gravatar image

roan98dk
326192034

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Asked: Feb 16 '13 at 07:23

Seen: 8,799 times

Last updated: Sep 04 '13 at 05:24

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