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 a really good PortableSigner alternative? Take a look at these popular alternatives if you're hunting for software similar to PortableSigner. Let's take a quick peek at some comparison that highlight your device and platform.
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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Adobe Fill & Sign lets you fill, sign, and send any form fast. You can even snap a picture of a paper form and fill it in on your phone or tablet. Then e-sign and...
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