PDF安全

When to use these tools

Use these tools for permission control, password protection, safe unlock workflows, flattening, metadata cleanup, and PDF preparation before sharing outside your organization.

Output checks

• - Store passwords separately from the document.
• - Confirm that recipients can open the protected file before deadlines.
• - Sanitize metadata when the document exposes internal author names, software, or revision history.

Common mistake to avoid

Avoid treating password protection as a complete security policy. Only protect files you are authorized to manage and use secure channels for highly sensitive documents.