It's possible to sign PDF documents digital with X.509 certificates. This signed documents are read only. Therefore it's possible to implement "electronic paper".
Want another awesome PortableSigner alternative? Look no further. We researched the top alternatives and found several new PortableSigner alternatives that work with your platform or device. If you want even more options, we've also reviewed top PortableSigner-like software for your Mac, Windows PC, Android phone/tablet, Linux computer, or iPhone.
Use DottedSign to complete your work, including NDAs, sales contracts, lease agreements, permission slips, financial agreements, and more. Just import your document...
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PDF Reader is the one app you can rely on when you need a portable solution to work with PDFs.
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Create, Convert, Review and Edit PDF Documents on Windows, Mac OS X, and Linux. PDF Studio is an all-in-one, easy to use PDF editor that provides all PDF features...
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DigiSigner is a small but hot looking PDF viewer and signer tool. Secure your PDFs with DigiSigner. Create nice looking signatures with DigiSigner. Make your...
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