PDF security best practices

Security is habits, not a single button. These practices cover the most common ways documents leak.

The habits

1. Encrypt sensitive files with AES-256.
2. Redact by removing content, then strip metadata.
3. Send passwords over a separate channel.
4. Flatten finals so nothing hidden travels.
5. Process files on your own device when you can.

Least privilege

Share only what a recipient needs, only with those who need it, and revoke access when a project ends.