How to Validate Digital Signatures in PDF Using Adobe Reader
Paurush dabbles around iOS and Mac while his close encounters are with Android and Windows. Before becoming a writer, he produced videos for brands like Mr. Phone and Digit. On weekends, he is a full-time cinephile trying to reduce his never-ending watchlist, often making it longer.
Validate Digital Signatures in PDF Files on Mac
For those using Adobe Acrobat Reader on Mac, you must enable a few options before checking for digital signature validation. Follow these steps to validate digital signatures inPDF filesif you are a Mac user.
Step 1:OpenAdobe Acrobat Reader> open yourPDF file.
Step 2:Click onAcrobat Readerat the top-left corner > selectPreferences.
Step 3:In the Preferences window, click onSignaturesfrom the left menu.
Step 4:Click onMoreunder the Verification tab on the right.
Step 5:In the Signature Verification Preferences windows, uncheckRequire Certificate Revocation…verification.
Step 6:Click onOk.
Step 7:Close the window and click on thedigital signaturein your document.
The Signature Validation Status window will open on your screen.
Step 8:Click onSignature Propertiesand chooseValidate Signature.
Step 9:Close the Signature Validation Status window. If you notice a green tick, your signature has been validated.
Validate Digital Signatures in PDF Files on Windows
Adobe Acrobat Reader on Windows also needs to enable the signature validation option. However, the steps to enable the option to validate digital signatures in PDF files are slightly different forWindows users.
Step 1:OpenAdobe Acrobat Readerand go to yourPDF file.
Step 2:Click onEditat the top-left corner of the menu bar > choosePreferences.
Step 3:Scroll down and click onSignaturesfrom the left menu.
The rest of the steps to validate the digital signature remain the same as for Mac users – check from Step 4 onwards.
Check the Validity of Digital Signature in PDF File
If you receive a PDF file with a validated digital signature, check the validity of the signature by following these steps which are the same for Mac and Windows.
Step 1:Open thePDF filewith the validated digital signature.
Step 2: Right-clickon the digital signature > chooseShow Signature Properties.
Step 3:In the Signature Properties window, check theSigning TimeandSource of Trustfor validating the signature.
Step 4:To check whether the document was modified after it was signed, click on theShow Signer’s Certificatebutton under Signer Info.
The certificate will open on your screen for the PDF file.
Check Digital Signature History in PDF File
The Signature Panel in Adobe Acrobat Reader allows you to check information about each digital signature in your PDF file. You can also view the history of changes done in the digital signatures. Here’s how to do that in Adobe Acrobat Reader for Mac and Windows.
Step 1:Open yourPDF file with the digital signaturein Adobe Acrobat Reader on your Mac or Windows computer.
Step 2:Click onViewat the top menu bar > chooseShow/Hide.
Step 3:SelectNavigation Panes> chooseSignatures.
The Signatures panel will open on the left side of your screen.
Step 4:Double clickon the signature name or click the arrow alongside the signature to view the changes history.
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Last updated on 26 July, 2024
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