The different protocols used to authenticate the author of a document are also the ones used to verify a signature that a user added to a document. It’s a method you would use when you need to verify the identity of the sender or author of a document. You can use a digital certificate, a hash function, or public key cryptography to attach a unique code to a document and indicate who authored it. The term digital signature can also refer to a number of methods used to authenticate the author of a document.You will sometimes find the term electronic signature used to refer to this type of digital signature. ![]() This type of digital signature is what you would find on an electronic sales contract. Just like a physical signature, it creates a legally binding agreement between the parties who sign the document.
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