.LF File Extension
SoftwareKey System License File
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What is an LF file?
An LF file is a license file created by SoftwareKey System, a software licensing suite. It contains XML-formatted text used to register a software application. Unless you are a developer using SoftwareKey System, you likely should not open or edit an LF file.
Some commercial software applications require users to buy a license to use the application or access advanced features. After a user purchases a license, they may be sent an LF file. The LF file contains the user's licensing credentials, which the application references to confirm the user's purchase.
LF files are used by applications that are licensed using SoftwareKey System, which is a licensing suite developers can use to streamline their app's licensing process. Instead of creating and maintaining their own app licensing system, developers can integrate their app with SoftwareKey System and let that application handle creating and verifying user's licenses.
The LF files that SoftwareKey System produces are typically encrypted. However, in both their encrypted and decrypted forms, LF files contain XML-formatted text that defines a user's licensing credentials.
How to open an LF file
Typically, LF files are not meant to be opened or edited. Editing an LF file may invalidate your application license.
If you are a developer who wants to edit your LF files' XML schema, you can do so using SoftwareKey Protection PLUS, which is included in SoftwareKey System.