.NET PDF Signature Library
Use digital signatures and certificates to ensure the authenticity and integrity of your PDF documents.
Add advanced signing support with a high level of security to all your applications with the GdPicture.NET PDF Signature SDK, including:
- PDF/A compliance
- Various digital certificates support
- Timestamp support
- Multiple signatures support
Digital signatures
Each country has laws regarding the use of digital or electronic signatures.
In the European Union, the eIDAS regulation allows three types of electronic signatures:
- the simple electronic signature suitable for everyday acts or those with low legal or financial consequences for the signatory.
- the advanced electronic signature, which includes the use of a digital certificate.
- the qualified electronic signature, generally used for authentic acts of notaries, lawyers, bailiffs, courts, and the like. Its security criteria are comparable to those of the advanced digital signature.
Still, its procedure cannot be entirely carried out remotely: a certification authority approved by the government must verify and validate the identity of the signatory.
You can use the GdPicture.NET PDF Signature SDK in all cases, thanks to the high level of security and the ability to import a digital certificate.
Main features
Digital certificates
A digital signature certificate (DSC) contains information about the user’s name, pin code, country, email address, date of issuance of the certificate, and name of the certifying authority. It also makes it possible to prove that the document has not been modified since the signature. The digital certificate is an electronic file, as well as a private key allowing cryptographic signature operations. Only a Certification Authority, whose role is to verify the identity and make the link between the private signature key and the identity of the signatory, can issue a certificate.
Main features
Security of the digital signing process
The digital signature process is based on an encryption system with a private key (which is used to sign) and a public key (to verify the signature). It is this encryption system that allows authentication of the document sender. To ensure the highest security level, GdPicture.NET uses the SHA-256 hash algorithm.
Read more about the safety of the signing process.
Main features
Digital signing on the Web
Get all the GdPicture.NET signing features in your web applications with our HTML5 Viewer and Document Management Kit DocuVieware.
The digital signature features are conveniently bundled in a snap-in.
Test the DocuVieware demo
Unified API to sign a PDF
Thanks to our PassportPDF API, you can integrate PDF signing features in any application.
Try with your document
How to use
Download and install GdPicture.NET package from here.
You will be able to find some compiled demo applications in
[Install directory]\Samples\Bin\
You will be able to find C# and VB.NET demo applications including source code in
[Install directory]\Samples\WinForm\
You will find other code snippets within the online reference guide found here
https://www.gdpicture.com/guides/gdpicture/
You can find some discussions about PDF in the dedicated section of our community forums located here
