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PUBLIC file format description

PUBLIC file format

We made this page to help you understand how to work with PUBLIC files. Here, you can find info on software that can handle these files. It includes simple programs for opening and converting them.

Learn about the PUBLIC file and its functions here!

We also explain how to convert them into other types. It's simple and hassle-free. For opening or changing PUBLIC files, this page offers all the tools you need.

#1 OpenSSL Public Key Data

The PUBLIC file is categorized under Data. It is associated with OpenSSL, serving as an OpenSSL Public Key Data. OpenSSL is a robust, commercial-grade, and full-featured toolkit for the Transport Layer Security (TLS) and Secure Sockets Layer (SSL) protocols. Visit the website of OpenSSL for a detailed description of the PUBLIC format.

Application:OpenSSL
Category:Data files
Mime-type:application/octet-stream
Magic:- / -
Aliases:-

OpenSSL Public Key Data related extensions

  • ca OpenSSL Certificate Authority Data
  • cerf Certificate Enrollment Request File
  • crt Certificate File
  • csr Certificate Signing Request Data

Windows can't open your PUBLIC file?

When you try to open a file by double-clicking it, Windows looks at the file's name to figure out what to do. If Windows doesn't know the file type, it'll ask you to choose an app to open this PUBLIC file.

To set the PUBLIC file association in Windows 11, you can follow these steps

  1. Open the Settings app by clicking on the Start menu and selecting the gear icon.
  2. In the Settings app, click on System and then select Apps from the left-hand side menu.
  3. Scroll down and click on the Default apps option.
  4. In the Default apps section, you will find various categories. They include Email, Web browser, and Music player.
  5. Locate the category that matches the file type you want to associate. For example, choose Photos for image files, or Video player for video files.
  6. Click on the current default app listed under the category. A list of available apps will appear.
  7. Choose the app you want to set as the default for that file type. If the app you want is not listed, click on More apps to see more options. Or, click on Look for an app in the Microsoft Store to search for apps.
  8. After selecting the app, it will become the default choice for opening files of that type.

It's worth mentioning that you don't always need to set PUBLIC file association. Many apps can open files. They don't need a specific file association to be set.

Handle PUBLIC files with care

Exercise caution when handling PUBLIC files from unknown sources. Files from certain sources can threaten your computer's security. They might contain malware, viruses, or harmful software. To minimize risks, avoid downloading or opening unfamiliar PUBLIC files. Use trusted antivirus software to scan files from unknown sources before opening.

If you find the information on this PUBLIC page useful, please feel free to link to this page.

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