Password Protection

Encrypt your PDF documents with passwords to control access.

Password Types

Open Password (Document Open)

Required to view the document:

• Encrypts entire document
• Must enter password to open
• Strongest protection level

Permissions Password (Owner)

Required to change security settings:

• Doesn’t prevent viewing
• Controls permission changes
• Can be different from open password

Adding Password Protection

1. Open the document
2. Click Security → Password Protect
3. Choose password type(s)
4. Enter password(s)
5. Select encryption level
6. Click Apply

Encryption Levels

Creating Strong Passwords

Good passwords:

• At least 12 characters
• Mix of letters, numbers, symbols
• Not dictionary words
• Not personal information

Example: Tr0ub4dor&3Horse!

Removing Password Protection

1. Open the password-protected PDF
2. Enter the password
3. Click Security → Remove Password
4. Enter owner password if required
5. Confirm removal

Changing Passwords

1. Open the document
2. Click Security → Change Password
3. Enter current password
4. Enter new password
5. Confirm new password
6. Click Apply

Batch Protection

Apply passwords to multiple documents:

1. Select multiple documents
2. Click Security → Password Protect
3. Enter password settings
4. Apply to all selected

Password Recovery

Best Practices

• Use different passwords for different sensitivity levels
• Store passwords securely (password manager)
• Share passwords through separate channels
• Consider permissions passwords for internal docs
• Use 256-bit AES for sensitive content

Next Steps

• Permissions - Restrict printing, copying, and editing
• Certificate Encryption - Use PKI-based encryption for enterprise
• Digital Signatures - Sign documents cryptographically