![]() ![]() It can also show a warning if the document has been altered after it has been signed. It’s still possible for someone to spoof a signature by just creating a digital signature with your name on it, but it won’t match the digital signature you usually use, so it will be possible to spot a forgery if someone checks it carefully - and Acrobat Reader can check signatures automatically. This is more secure than option 1, with not much extra work to set up at the beginning, so this is probably what you want to do. (Adobe Reader helps you do this.) Whenever you want to sign a document you will simply type that secret password to add the signature. To set this up you create a “certificate” file, which is encoded by a password. Option 2 adds a digital signature to the document, which is more secure. But this option is not the most secure, because after all, if you can add an image of a signature, so can someone else. The idea is that you load a photo of your personal signature into Acrobat Reader (or you create a signature with the mouse - but who can do that?) and then Acrobat Reader can overlay this signature onto your document. Option 1 is the easiest, and it’s basically a (less secure 1) replacement for the steps of a) printing something out, b) signing it with a pen, and then c) scanning it to send to someone else. ![]() This topic can be confusing because an “on-line” signature can mean any of these, and each one is different from the others: Add a digital signature using a certificate signed by a Certificate Authority (even more secure).Add a digital signature using a self-signed certificate and an image of your handwritten signature.Add a digital signature using a self-signed certificate (more secure).Add an image of your hand-written signature (easiest, but least secure).There are actually several levels of both security and complexity, so depending on what you want to do you can either choose the easiest, or the most secure (well, at least more secure). It is possible to use Adobe Acrobat Reader to “sign” documents. ![]()
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