# Certificate and Private Key Handling

> Plan signing in a WPF application: X509Certificate2 keys in PFX files, the current user's certificate store or on smart cards, test certificates and timestamps.

- **Product:** TX Text Control .NET for WPF
- **Section:** Documentation
- **Kind:** Topic
- **Path:** TX Text Control .NET for WPF > Security > Certificate and Private Key Handling
- **Web URL:** https://docs.textcontrol.com/tx-text-control-dotnet-wpf/security/certificates/
- **LLMs URL:** https://docs.textcontrol.com/tx-text-control-dotnet-wpf/security/certificates/llms.txt
- **LLMs-Full URL:** https://docs.textcontrol.com/tx-text-control-dotnet-wpf/security/certificates/llms-full.txt

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## On This Page

- [How TX Text Control Uses the Certificate](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/security/certificates/#how-tx-text-control-uses-the-certificate)
- [Choose Where the Private Key Is Kept](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/security/certificates/#choose-where-the-private-key-is-kept)
- [Handle PFX Files With Care](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/security/certificates/#handle-pfx-files-with-care)
- [What Makes a Signature Trustworthy](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/security/certificates/#what-makes-a-signature-trustworthy)
- [Next Steps](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/security/certificates/#next-steps)

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## Nearby

- **Previous:** [PDF Passwords and Permissions](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/security/pdf-passwords/llms.txt)
- **Next:** [Secure Application Deployment](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/security/deployment/llms.txt)