The digital ID contains a private key and certificates with a public key. You can create a self-signed digital ID using Adobe Reader. To create a PDF digital signature, you need a digital ID. Remove existing digital signatures from a PDF document.Retrieve digital signature information from a PDF document.Digitally sign a PDF document with long-term archive timestamps (LTA).Digitally sign a PDF document with long-term validation (LTV).Digitally sign the existing signature field in a PDF document.Digitally sign a PDF document with an external signature.Include an author or certifying signature in a PDF document.Digitally sign a PDF document using Windows certificate store.Add multiple PDF digital signatures in a single PDF document.Create PDF digital signatures with CAdES and different hashing algorithms.Change the signature appearance based on the signature validation.Create PDF digital signatures with custom appearances.The complete details to create and validate PDF digital signatures in C# are explained in the following topics in this post: Nonrepudiation: The signatory cannot deny authorship.Authenticity of the document: Assures the authenticity of the person who signed the electronic document.Integrity of the document: Ensures that the document has not been altered somewhere in the workflow.NET PDF library that allows the users to create and validate PDF digital signatures in C# and VB.NET.Ī PDF digital signature is basically a secure way to ensure the following: BoldSign – Electronic Signature Software.
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