Sign individual signature fields with a digital certificate(s).Sign the whole document with a digital certificate.When signing Adobe PDF documents, 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.
To ensure that a document has not been altered by a third-party and to verify that the author is the expected person, documents can be digitally signed.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 to share all kinds of information including data with a legal value such as in contracts or invoices.
