IAC application for remote sign

please search for signature in the JavaScript reference.

For sure, JavaScript can sign using signature fields. It does so using a signature handler provided by Acrobat or a plug-in. So you come back to a plug-in, unless PPKLite will do what you want. According to Digital Signatures , "Security handlers are Acrobat plugins. Information about creating plugins in general and security handlers in particular can be found in the Acrobat Software Development Kit (SDK) and its HFTs, header files, and other API documentation. Because Acrobat's Adobe.PPKLite is becoming more feature rich with each release, it is unlikely that you will need a custom security handler. "

So I suggest as your next step you examine what PPKLite can do. So long as you can work with signature fields, maybe it can use system security handlers, so you can install your network signer to the system via a local driver. This is getting outside what I know.

Yes, an Acrobat plug-in. These are written in C++. It would have fairly small connection to Acrobat; save a file, send/process for signature, receive, edit local PDF, possibly reopen in Acrobat. I think you may find that the library you were using was doing a lot of stuff that you will need to reimplement. Plug-ins do have a specific signature API, but it does not seem especially applicable to remote signatures. However, as you study it, you may find that it is a perfect fit to your signature architecture - which as I say you will likely need to understand in painful detail.

I understand. By plug-in you mean an Acrobat plug-in? I said that i used Secured Black Box library and made this work, but this is a proiect for school and i need to make a IAC or an Acrobat plug-in to remote sign the PDF-s.

No there is no support specifically for remote signatures. A plugin in could, I am sure, implement them; it can send files or hash to a server and handle the results. But you said IAC. There is absolutely nothing in IAC to do this or enable you to do it. An external app could be written to connect to a signature server but Acrobat wouldn’t be involved.

You’re certainly going to need a very detailed knowledge of how signatures work in general and your proposed signatures work, or a complete API to do it for you.

None of that sounds possible. But I may not understand. How do you propose to get the hash of a PDF? What kind of hash?