Overview

This guide explains different ways of digitally signing a PDF document using UniPDF.

Here is the list of digital signatures included in this guide:

• Create Image Appearance for Digital Signature
• Signing and Encrypting PDF File
• Create Appearance Field for Digital Signature
• Sign and Configure DocMDP Restriction
• Sign and Configure DocMDP Restriction with Valid Changes
• Sign and Configure DocMDP Restriction with Invalid Changes
• Sign with External Services
• Sign with AWS KMS Service
• Using Google Cloud KMS Service
• Sign with Global Sign DSS Service
• Retrieving Revision of a PDF Document
• Sign with Generated Private & Public Key Pair
• Sign with HSM via PKCS11
• Sign with PKCS12 File
• Validating Digital Signature
• Add Timestamp in Digital Signature
• Validating Timestamp in Digital Signature
• Append a New Page for Digital Signature
• Sign with PEM File
• Add Multiple Signature Field
• Signing PAdES Baseline B Signature
• Validating PAdES Signature
• Signing PAdES Baseline T Signature
• Signing PAdES Baseline LT Signature
• Signing PAdES Baseline LTA Signature

LTV Enabled signatures #

In the following guides LTV (Long-Term Validation) enabled signatures are explained.

• Enabling LTV Using One Revision
• Enabling LTV To Signed File
• Enabling LTV Using Second Revision
• Enabling LTV Using Second Revision And TimeStamp

LTV (Long-Term Validation) can be enabled by adding validation information for the digital signatures applied to a PDF file.