You can add a signature to a Google Doc with the built-in drawing tool. You can also use an add-on to add signatures to your document, or request them. Add-ons can be safer if they use encryption and ...
Researchers at the Ruhr-University Bochum in Germany have figured out three different ways to forge digital signatures in PDF documents. The fakes will be treated as genuine on 21 of 22 desktop PDF ...
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