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Tree Automata with One Memory, Set Constraints, and Ping-Pong Protocols

  • Hubert Comon
  • Véronique Cortier
  • John Mitchell
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 2076)

Abstract

We introduce a class of tree automata that perform tests on a memory that is updated using function symbol application and projection. The language emptiness problem for this class of tree automata is shown to be in DEXPTIME. We also introduce a class of set constraints with equality tests and prove its decidability by completion techniques and a reduction to tree automata with one memory. Set constraints with equality tests may be used to decide secrecy for a class of cryptographic protocols that properly contains a class of memoryless “ping-pong protocols” introduced by Dolev and Yao.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2001

Authors and Affiliations

  • Hubert Comon
    • 1
    • 2
  • Véronique Cortier
    • 2
  • John Mitchell
    • 1
  1. 1.Department of Computer ScienceStanford University
  2. 2.Laboratoire Spécification et VérificationCNRS and Ecole Normale Supérieure de CachanFrance

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