I need to send an executive commission report containing sensitive numbers to finance and the CEO requires certificate…
Open the PDF you want to encrypt in Adobe Acrobat Pro.
Go to the File menu and select Properties.
In the Document Properties dialog, select the Security tab.
From the Security Method dropdown, choose Certificate Security.
Click Next to start the Certificate Security wizard.
Add recipients by selecting their certificates from your system or importing them.
Best practiceIf a recipient’s certificate is not available, ask them to send you their public certificate file before proceeding.
Set the desired permissions for each recipient, such as printing or editing rights.
Click Next, review your settings, and then click Finish.
Save the PDF to apply certificate-based encryption.
CautionOnly recipients with the corresponding private key will be able to open the encrypted PDF.
After encrypting with a certificate, you can verify the security settings by reopening the PDF and checking the Security tab in Document Properties.
This runs in the Acrobat app - there is no separate API for this task.
Encrypting with a certificate is stronger because it is recipient-specific. Each person gets a unique key, meaning there's no shared secret like a password that could be guessed or leaked. This method uses public and private key pairs, where the public key encrypts, and only the matching private key can decrypt, making it much harder for unauthorized users to access the document.
If you forget to add your own certificate, you will lock yourself out of the PDF. Because the document is encrypted for others' public keys, you will not have a key to decrypt it yourself. Always include your own certificate in the list of recipients to ensure you can reopen and access the file.
You manage these certificates through 'trusted identities' in Acrobat. You need to have each recipient's public key (from their certificate) saved in your trusted identities before you can encrypt a PDF for them. This ensures Acrobat recognizes their certificate for the encryption process.
Yes, when you 'Encrypt with Certificate', you can set specific permissions for each recipient. This means one person might be allowed to print the document, while another can only view it. This granular control over permissions adds another layer of security and customization to your encrypted PDFs.