Signature électronique Excel Simplifiée

How To Install Electronic Signature in Box

digital signatures will confirm the identity of the person who sent the workbook that's what they're mainly used for and they're typically issued by a certification authority or CA in other words trusted third party who issues these things and they'll contain a few things like a serial number a digital signature of issuing authority expiration dates name and copy a certificate holders public key so the user you can verify that certificate as authentic and however these third parties do it wherever you sign up from to confirm that the signature is accurate they may have you log in or punch in a number the serial number that is to confirm that whoever sent you this workbook is who they say they are in any case once you attach the signature to the document it cannot be modified without removing the digital signature so if my coworker Carrie always digitally signs these documents and I get one that's not signed it can be one of two things one that she forgot to sign at which case I can email her saying hey what's the deal can I trust this would you please resend it and digitally sign it or two she did and somebody intercepted it from a server or something made changes to it now there are two types of signatures they're both basically digitally signing the document here one is non visible in other words you have to click on an icon down here in the status bar to be able to open up the task pane to see the digital signature in fact any time you digitally sign one way or the other it'll always have a little red ribbon down below to let you know that it's signed but in any case you click on it opens up the task pane that's one that's the hidden digital signature the other one that's visible is basically a signature line it has an X with a line underneath that that you can go ahead and type in your name on that line and it digitally signs it as well both of them will have a serial number attached to it just whichever way you prefer something fancy that's visible or something that you have to open up the task pane to view so if I want to do it non visible at first then I'd come up here to click on the file tab go to info then come down here and click on protect workbook and go to add a digital signature the other way if I want to signature line when that's visible then I come up here and click on the insert tab come over here to the text group and click on the signature line see when I hover over it gives you an X line underneath it the name and then you just go ahead and type in your name above the line they both digitally sign or attach that serial number...