How can i create certified pdf with c#?
A certified PDF is basically a PDF that has been digitally signed using a certificate that is trusted by the Adobe Root Certificate. This service is called Adobe Certified Document Services. When your document is signed it displays a blue ribbon at the top and verifies that the document is from you and it hasn't been tampered with.
You can get the certificate from a participant of the service, we use one called GlobalSign
Once you have the certificate you need to get a device to actually sign the documents, this can be a USB stick that you plug into your PC or a PCI HSM card that sits in a server for high volume signing.
Once you have this in place your PDF's will display the blue ribbon
In our system we used Morphon Tom to actually sign the PDFs, it's a webservice that you simply send a PDF to and it returns it signed using your certificate.
Hope this gets you started!
Interesting component for PDF signing:
Signing using smart cards and cryptographic tokens
CAdES signatures
LTV signatures
Multisigning
docs
Related
I am using a third party cloud certificate signing application. From what I have been able to observe the application "downloads the certificate" and installs it but without a private key. If, for example, I open a PDF document with Adobe and sign with Adobe itself and select the certificate that I downloaded with the third-party application, if the application is not open, signing with Adobe does not work. In summary, to sign with a certificate from the third-party application, it must be open, the same happens if I sign with the browser with that certificate, how is it possible for Adobe or the browser to communicate with the third-party application? I need to make a similar application.
Do I have to create a driver filter? can someone guide me?
I am new to digital signatures. I have spent the last couple of days learning about how digital signatures work, cryptography etc.
My task is to sign a batch of .xml documents with a digital signature that use PKCS#11 (smart card) using C# and zip all the signed documents and send it to a Web API of our client.
Everytime I used the smart card it installs a certificate on the browser.
The smart card is from a root CA so there is no needs of a verification of a certified chain and check each certificate.
Question is .. how do I write the code or better where do I start? Any documentation will be I have tried to dig documentation .. to no avail.
Only resources are available on JAVA and they are using some java applets.
I want to digitally sign PDF by epass2003 DSC USB token on my website on ASP.NET C#.
My requirement step by step on website
Firstly client attach the usb don-gal on his machine then code verify it
Then sign the PDF with DSC USB token Certificate with sign-in
Suggest me right full examples. I have write lot's of code with #x509certificate2 and #pkcs11 which is not working for me
I have a web application based on C#,asp.net.
In application i generate an xml file that contents journal records.
Admin user must sign this xml file with his usb token.
In windows application i can read usb token certificate file and i can sign the xml file.
But in web application i execute the same code and i get an this error:
"Card inserted card reader not found".
How can i access on client usb token and certificate from ny web application?
Is there anyone using electronic signature on web application?
There is no easy solution. You have to create ActiveX control or Java applet and install it on client machine. That is how my internet banking works.
The usual and the easiest way is to let the users upload a scanned copy of their signatures. The application should then save it somewhere (database or some folder on the server). Whenever required, these users should be able to use their signatures. It then automatically becomes electronic signature. Just properly authenticate and authorize users before letting them use the electronic signatures.
Hope this helps!!
I want to programatically add a digital signature to multiple DOCX files, using the standardized approach of the method Sign() from PackageDigitalSignatureManager object.
As in for example:
http://blogs.infosupport.com/blogs/wouterv/archive/2007/02/24/Signing-Office-Open-XML-documents-using-the-Packaging-API.aspx
The thing is that, when I user the method Sign, it prompts the user for PIN Key, because the Microsoft Crypto API is trying to access the Private key in a SmartCard.
Is there any way where I can only use the method Sign once when adding a digital signature to multiple DOCX file, therefore the user is only prompted once when signing multiple files?
In your case PIN is prompted for each access to the token. Usually this is configurable on smartcard driver level, i.e. there's an option there to cache PIN value for a process. An alternative is to use PKCS#11 interface to access certificates. This is possible using our SecureBlackbox product, which offers signing of Office documents (this includes MS Office and OpenOffice) using certificates via PKCS#11 interface (as well as CryptoAPI).