GTPL: A graphical trust policy language

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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.

Original languageEnglish
Title of host publicationProceedings of Open Identity Summit 2019
EditorsHeiko Rossnagel, Sven Wagner, Detlef Huhnlein
PublisherGesellschaft fur Informatik (GI)
Publication date1 Jan 2019
ISBN (Electronic)9783885796879
Publication statusPublished - 1 Jan 2019
EventOpen Identity Summit 2019 - Garmisch-Partenkirchen, Germany
Duration: 28 Mar 201929 Mar 2019


ConferenceOpen Identity Summit 2019
SeriesLecture Notes in Informatics (LNI), Proceedings - Series of the Gesellschaft fur Informatik (GI)


  • Graphical language
  • Trust policy

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