Submit portable freeware that you find here. It helps if you include information like description, extraction instruction, Unicode support, whether it writes to the registry, and so on.
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I did not find any similar software in the database for digitally signing pdf files, so I submit this quite old software as a portable app. It is a very lightweight alternative for using LibreOffice for signing pdf files.
iSafePDF is a free open source PDF protection software.
it allows you to encrypt PDF document, signe them using a certificate and timestamp the signature.
all those features are PDF standards so your document will be readable/editable with all standard PDF programs.
It's a basic program, which does not seem to save any settings at all, so I believe it is a totally portable solution.
The software can be downloaded at http://isafepdf.eurekaa.org/download-isafepdf/
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[url]http://isafepdf.eurekaa.org/[/url] author wrote:iSafePDF
is a free open source PDF protection software. It allows you to encrypt PDF document, sign them using a certificate and timestamp the signature. All those features are PDF standards so your document will be readable/editable with all standard PDF programs.
- Thanks, perwhis. Great suggestion.
Here's a couple of screenies I made up...
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I'll dig into this myself when I have some more time but some questions that jumped out on me were whether you need an existing cert? If so, is there a place to get one? Can you generate one like GPG?
Also, I think PDF Shaper can now sign PDFs
https://www.portablefreeware.com/forums ... 183#p67183