# Passwords and Access Permissions

> Protect PDF files from a WPF TextControl with user and master passwords, access permissions and the Save As dialog, and open protected PDFs with a PasswordBox.

- **Product:** TX Text Control .NET for WPF
- **Section:** Documentation
- **Kind:** Topic
- **Path:** TX Text Control .NET for WPF > PDF Processing > Passwords and Access Permissions
- **Web URL:** https://docs.textcontrol.com/tx-text-control-dotnet-wpf/pdf/passwords/
- **LLMs URL:** https://docs.textcontrol.com/tx-text-control-dotnet-wpf/pdf/passwords/llms.txt
- **LLMs-Full URL:** https://docs.textcontrol.com/tx-text-control-dotnet-wpf/pdf/passwords/llms-full.txt

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## On This Page

- [How PDF Passwords Work](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/pdf/passwords/#how-pdf-passwords-work)
- [Protect the Document When Saving](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/pdf/passwords/#protect-the-document-when-saving)
- [Let the User Set the Password in the Save As Dialog](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/pdf/passwords/#let-the-user-set-the-password-in-the-save-as-dialog)
- [Open a Password-Protected PDF](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/pdf/passwords/#open-a-password-protected-pdf)
- [Apply the Permissions in the Editor](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/pdf/passwords/#apply-the-permissions-in-the-editor)
- [Encryption TX Text Control Can Open](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/pdf/passwords/#encryption-tx-text-control-can-open)
- [Save a Loaded PDF With Its Password](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/pdf/passwords/#save-a-loaded-pdf-with-its-password)
- [Check That a PDF Is Encrypted](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/pdf/passwords/#check-that-a-pdf-is-encrypted)
- [PDF Passwords and Document Protection](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/pdf/passwords/#pdf-passwords-and-document-protection)
- [Next Steps](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/pdf/passwords/#next-steps)

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## Nearby

- **Previous:** [Document Metadata](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/pdf/metadata/llms.txt)
- **Next:** [Digital Signatures](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/digital-signatures/llms.txt)