How to Verify a Digital Signature in a PDF (Step-by-Step Guide)
Learn how to verify a digital signature in a PDF using Adobe Reader. Understand certificate validation, PKI verification, CRL, OCSP checks, and legal validity under the IT Act.
How-To Guides
What Happens When You Open a Digitally Signed PDF? (Complete Signature Validation Explained)
When you open a digitally signed PDF, your PDF reader performs multiple cryptographic and trust validations to confirm that the document is authentic and has not been altered. These checks happen within seconds but involve complex Public Key Infrastructure (PKI) mechanisms. This article explains exactly what happens behind the scenes when a digitally signed PDF … Read more
Digital Signature vs eSign: Complete Guide for PKI Experts, CAs, and ASPs [2026]
Digital signatures represent the cornerstone of Public Key Infrastructure (PKI), providing cryptographic assurance of document authenticity, integrity, and non-repudiation. These mathematical constructs, based on asymmetric cryptography using private and public key pairs, enable secure electronic transactions across industries, governments, and trust ecosystems. In contrast, eSign is an electronic signature service model that enables users to … Read more
Step-by-Step Guide to Applying for a Digital Signature Certificate (DSC) for Income Tax and GST Filing
This simple guide will help you apply for a Digital Signature Certificate (DSC) to file Income Tax Returns and GST online. No agent needed—just follow the steps.