GTPL: A Graphical Trust Policy Language

Abstract

We present GTPL, a Graphical Trust Policy Language, as an easy-to-use interface for the Trust Policy Language TPL proposed by the LIGHTest project. GTPL uses a simple graphical representation where the central graphical metaphor is to consider the input like certificates or documents as forms and the policy author describes “what to look for” in these forms by putting constrains on the form’s fields. GTPL closes the gap between languages on a logical technical level such as TPL that require expertise to use, and interfaces like the LIGHTest Graphical-Layer that allow only for very basic patterns.