The first method shows how to digitally sign the complete document with one certificate. But in many cases, an electronic signature that is captured using the TX Text Control Document Viewer, can be signed with a digital certificate. Technically, a visual representation of the signature compared to wet ink is not required to sign a document. Sign individual signature fields with a digital certificate(s).Sign the whole document with a digital certificate.When signing Adobe PDF documents with TX Text Control, there are two different approaches:

This hash function is used on almost all elements of a document and is then stored inside the document.

The result of this function is always identical for this block of data, if the data block has not been altered. Documents can be digitally signed to ensure that a document has not been altered by a third-party and to verify that the author is the expected person.Ī digital signature use the concept of hashing - a mathematical function that converts a block of data into a fixed-size string. The Adobe PDF document format is used in many types of documents including data with a legal value such as in agreements and contracts.

Add digital signature in pdf