How do I lock a Word Exhibit PDF so only certain people can open it?

Open your PDF in Adobe Acrobat. Go to the Protect or Security section. Set a Document Open Password. Choose strong encryption (AES-128 or AES-256). Save the file and share the password only with the right people.

What is the difference between a Document Open Password and a Permissions Password in Acrobat?

Password Type What it Does. Document Open Password Stops people from opening the PDF without the password. Permissions Password Lets people open the PDF, but stops them from editing, printing, or copying without the password.

If I lose the password for my locked PDF, what can I do?

You cannot open the locked PDF without the password. Adobe Acrobat cannot recover or reset your password. Use your backup copy of the file that is not locked, if you made one.

Lock Word Exhibits in Adobe Acrobat — How-to & AI prompts

AI prompts

2 ways to ask · copy any one

AExecute — “help me do it”Convert the incoming Word exhibits for the Rivera matter to locked PDFs so content can't be…+

Convert the incoming Word exhibits for the Rivera matter to locked PDFs so content can't be changed: convert Exhibits 1–3 to PDF, add viewing/password protection, and send the locked files to opposing counsel and to our case file by Thursday.

when the reply comes backPush once: ask it to sharpen the weakest part, and to say what it assumed.

BImprove — “do it better”Before distributing exhibits as locked PDFs, prevent review friction and maintain forensic…+

Before distributing exhibits as locked PDFs, prevent review friction and maintain forensic integrity: convert Exhibits 1–3 to PDF, set a viewing password and note it in a secure cover email to counsel, flatten editable elements, and stamp each PDF with Rivera_Exhibit and the conversion date so reviewers know these are the authoritative versions.

when the reply comes backPush once: ask it to sharpen the weakest part, and to say what it assumed.

How to do it

the tool · the steps · what to avoid

1
Open the PDF file you want to encrypt in Adobe Acrobat Pro.
2
Go to the File menu and select Properties.
3
In the Document Properties window, click the Security tab.
4
In the Security Method dropdown, select Password Security.
5
Check the option to require a password to open the document.
6
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.
7
Click OK to apply the settings.
8
When prompted, re-enter the password to confirm.
9
Save the PDF to finalize password protection.
Best practiceFor best security, choose a strong password and select 'Encrypt all document contents' if prompted.

In the appWith the API

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.

Glossary

words on this page

EncryptTo lock a file so only people with the password can open it.ExampleShe will encrypt the sensitive document so only authorized team members can open it with a password.

Permissions PasswordA password that lets you control what people can do with the PDF, like printing or editing.ExampleYou set a Permissions Password to stop others from copying text from your confidential report.

AES-256A strong type of encryption that makes the PDF very hard to unlock without the right password.ExampleA document encrypted with AES-256 requires the exact password to be opened.

The real tasks

the one, listed here

Convert incoming Word exhibits into a locked format so their content can't be altered during review.

FAQ

about this task

Open your PDF in Adobe Acrobat.
Go to the Protect or Security section.
Set a Document Open Password.
Choose strong encryption (AES-128 or AES-256).
Save the file and share the password only with the right people.

Password Type	What it Does
Document Open Password	Stops people from opening the PDF without the password.
Permissions Password	Lets people open the PDF, but stops them from editing, printing, or copying without the password.

AES-256 encryption is very strong and makes it much harder for someone to break into your PDF without the password. This is important when you are sharing sensitive or private information, like legal exhibits, because it protects them from being seen or changed by people you do not trust. Using strong encryption keeps your documents safer.

You cannot open the locked PDF without the password.
Adobe Acrobat cannot recover or reset your password.
Use your backup copy of the file that is not locked, if you made one.

If you use a simple password, someone might guess it or use special tools to break into your PDF. A strong password with many letters, numbers, and symbols makes it much harder for others to open or change your file without your permission. Always use a strong password for better safety.

Lock Word Exhibits

When to use it

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How to do it

Glossary

The real tasks

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FAQ

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