Information flow tracking is a technique for preventing unauthorized information flow. An information flow policy is a set of rules that determine how information is allowed to move within a system. An information flow policy can also be represented as a directed graph. In the thesis, we will describe the development of an editor for such policies and the development of a related library. In addition to editing of policies, the editor also enables importing, exporting, combining, and analyzing policies. It functions both as a web application and a desktop application on macOS. It is developed using the Flutter framework and written in Dart, which is also used for the library.
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