Apply password protection to the onboarding spreadsheet PDF for [client=00982] so only recipients with the password ca…
Open the PDF file you want to encrypt in Adobe Acrobat Pro.
Go to the File menu and select Properties.
In the Document Properties window, click the Security tab.
In the Security Method dropdown, select Password Security.
Check the option to require a password to open the document.
Enter your desired password in the password field and confirm it when prompted.
CautionIf you forget this password, you will not be able to open the PDF.
Click OK to apply the settings.
When prompted, re-enter the password to confirm.
Save the PDF to finalize password protection.
Best practiceFor best security, choose a strong password and select 'Encrypt all document contents' if prompted.
You must save the PDF after setting the password for encryption to take effect.
This runs in the Acrobat app - there is no separate API for this task.
Choose a Document Open Password if you want to stop anyone from seeing your PDF without the password. Choose a Permissions Password if you want people to open the PDF, but you want to stop them from printing, copying, or changing it. You can use both passwords together for strong security.
AES-128 and AES-256 are different levels of encryption strength. AES-256 is stronger than AES-128, meaning it's harder for someone without the password to break the security and access your PDF content. Using stronger encryption like AES-256 is important for very sensitive documents to keep your information safe from unauthorized access.
If someone forgets the password for an encrypted PDF, you cannot recover it from the file itself. The best solution is to use your unprotected backup copy of the PDF and re-encrypt it with a new, memorable password. Make sure to share the new password securely with your team.
Using the Protect PDF API helps you encrypt many PDFs automatically, which saves a lot of time compared to doing it one by one. It also allows you to set the same security rules for all your documents, ensuring consistent protection. This is great for businesses that handle many documents and need to keep them secure efficiently.