SEPIA: Security-oriented PN Framework Icon

SEPIA: Security-oriented PN Framework


Petri net framework for security related modeling and reasoning.

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SEPIA provides implementations for various types of Petri nets. Along Place/Trransition-nets, it supports Petri nets with distinguishable token colors and defines coloured workflow nets, where coloured tokens are interpreted as data elements used during process execution. To support information flow analysis of processes, SEPIA defines so-called IF-Nets, tailored for security-oriented workflow modeling which enable users to assign security-levels (HIGH, LOW) to transitions, data elements and persons/agents participating in the process execution.

SEPIA builds upon the Java graph library JAGAL (located at and the Java library TOVAL (located at To use SEPIA, make sure JAGAL and TOVAL libraries are on the build path.

SEPIA: Security-oriented PN Framework Web Site


Mathematics, Modeling, Security


BSD License


  • Implementation of P/T nets
  • Implementation of Colored Petri nets
  • Implementation of Colored Workflow nets
  • Implementation of IF-Nets
  • Petri net traversal
  • Petri net refinement
  • Reachability utils
  • PNML Parsing

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Intended Audience

Advanced End Users, Security, Science/Research

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