Digital Signature Lifecycle: Certificate, Signatures, and Validation

This section will guide you through the process of implementing a digital signature lifecycle for signing a PDF document. By utilizing digital signatures, you can ensure the integrity and authenticity of your PDF files, establishing a secure and reliable method for verifying their content. We’ll outline the essential steps and provide code examples to assist you in comprehending and implementing the digital signature lifecycle efficiently.

1. Prepare the Certificates for Signing
   To sign a document, you need self-signed certificates or certificates from trusted authorities.

2. Add a Signature Field
   How to add a signature field, visible or invisible.

3. Sign a PDF Document
   How to sign a PDF document using basic or CAdES signature types.

4. View and Validate a Digital Signature
   How to verify and ensure the integrity of a digital signature.