Adding a digital signature to a PDF is the process of digitally verifying and certifying the authenticity and integrity of a PDF document. In the modern digital age, where the exchange of sensitive documents is commonplace, the ability to add digital signatures to PDFs has become increasingly important for various reasons.
Digital signatures provide numerous benefits, including enhanced security, authenticity, and non-repudiation. They ensure that the document was created and signed by an authorized person and has not been altered since its signing. Historically, the development of digital signatures can be traced back to the 1970s when public-key cryptography was introduced.