PDF is one of the most popular and mostly preferred document formats for creating and sending official documents. Some of those PDFs require a signature. Many organizations prefer to use PDF files as their official method of communication and use Adobe Acrobat Reader to open, sign, and check PDF files.
A useful feature of the Adobe Reader application is the validation of digital signatures in PDF files. That helps you sign contracts, agreements or even authenticate documents. This post will show you how to validate digital signatures in Adobe Acrobat Reader on Mac and Windows.
Digital signatures in PDF files have eased the document approval or verification process. You can even password protect your PDF files for security. You can easily validate digital signatures in Adobe Acrobat Reader on Mac or Windows. However, you should make sure that you are using the latest version of Adobe Acrobat Reader.
Follow these steps to check for updates. The steps are the same for Windows and Mac users.
Step 2: Click Help from the top menu bar.
Step 3: Select Check for updates.
The app will check for updates.
Step 4: If an update is available, click Yes to download and install it.
Validate digital signatures in PDF files on Mac
For those using Adobe Acrobat Reader on a Mac, you’ll need to enable a few options before testing digital signature validation. Follow these steps to validate digital signatures in PDF files if you are a Mac user.
Step 1: Press Command + Spacebar to open Spotlight Search, type Adobe Acrobat Reader, and press Back.
Step 2: Open the PDF file that you want to verify the digital signature.
Step 3: Click Adobe Reader in the top left corner of the menu bar.
Step 4: Select Preferences from the list of options.
Step 5: In the Options window, click Signature from the left menu.
Step 6: Click Add in the Verification tab on the right.
Step 7: In the Signature Verification Options window, click to uncheck the ‘Request to revoke certificate’ option.’
Step 8: Click Ok.
Step 9: Click Ok again to confirm your action.
Step 10: Close the window and click on the digital signature in your document.
The Signature Validation Status window will open on your desktop.
Step 11: Click on Signature Properties.
Step 12: Click Validate Signature.
Step 13: Close the Signature Verification Status window and notice a green checkmark to indicate that 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 digital signature validation in PDF files using Adobe Acrobat Reader are slightly different for Windows users.
Step 1: Open Adobe Acrobat Reader on your Windows system.
Step 2: Open the PDF file that you want to verify the digital signature.
Step 3: Once your file opens, click Edit in the top left corner of the menu bar.
Step 4: Select Preferences from the list of options.
Step 5: Scroll down and click Signatures from the menu on the left.
The remaining steps for digital signature validation remain the same as for Mac users – check from Step 10 onwards.
Check the validity of digital signatures in PDF files
If you received a PDF file with a verified digital signature, you can check the validity of the signature by following the same steps for Mac and Windows.
Step 1: Open the PDF file with a verified digital signature.
Step 2: Right-click on the digital signature to display the options.
Step 3: Click on Signature Properties.
In the Signature Properties window, you can check the Signing Time and the Trusted Source for signature validation.
To check if the document has been modified after it has been signed, click the Show Signer’s Certificate button under ‘Signer Information’.
The certificate will open on your desktop for the PDF file.
Check Digital Signature History In PDF Files
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 that have been made in the digital signature. Here’s how to do that in Adobe Acrobat Reader for Mac and Windows.
Step 1: Open your PDF file with a digital signature in Adobe Acrobat Reader on your Mac or Windows computer.
Step 2: Click View in the top menu bar.
Step 3: Select Show/Hide from the list of options.
Step 4: Select Navigation Panel.
Step 5: Click on Signature from the list of options.
The Signature panel will open on the left side of your screen.
Step 6: Double click on the signature name or click the arrow next to the signature to view the change history.
Easily validate digital signatures in PDF
Digital signature validation is a great way to verify your official documents or approve them for the next process in your company. The best part is that you can do this for free in Adobe Acrobat Reader. You don’t have to pay for an Adobe subscription.
Categories: How to
Source: thpttranhungdao.edu.vn/en/
