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SEPIA: Security-oriented PN Framework


Petri net framework for security related modeling and reasoning.

As of 2015-07-28, this project may now be found at

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SEPIA provides implementations for various types of Petri nets. Along Place/Transition-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 TOVAL (, JAGAL ( and SEWOL ( To use SEPIA, make sure these libraries are on the build path.

SEPIA encloses the Multi Schema Validator ( and isorelax (

The documentation can be found under

SEPIA: Security-oriented PN Framework Web Site


Security, Modeling, Mathematics


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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Additional Project Details

Intended Audience

Science/Research, Advanced End Users, Security

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