PDF Password Protection vs Encryption
PDF 'password protection' is often called encryption, but they serve different purposes. Understanding the difference helps you choose the right level of security for your documents.
Types of PDF security
| Type | What it does | Strength |
|---|---|---|
| Open password | Requires password to open the file | Medium (RC4 128-bit or AES-128/256) |
| Permissions password | Restricts printing, copying, editing without unlocking | Low (easily bypassed by tools) |
| AES-256 encryption | Encrypts all content with AES-256 | Very strong — current standard |
Practical advice
- Use an open password (AES-256) for documents you want to keep confidential
- Permissions passwords alone are weak — determined users can bypass them with free tools
- For sensitive financial or legal documents, use both an open password and AES-256 encryption
- Always share the password through a separate channel (not in the same email as the PDF)
Frequently Asked Questions
Can PDF permissions passwords be bypassed?
Yes. Many free tools can remove permissions restrictions from PDFs. Open passwords (document encryption) are far more secure.
What encryption does Irreva use?
Irreva's PDF Protect uses AES-128 encryption via pdf-lib, processed entirely in your browser. The PDF is encrypted before you download it.