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Wuhan University Journal of Natural Sciences

, Volume 11, Issue 6, pp 1516–1520 | Cite as

Mechanical proofs about BW multi-party contract signing protocol

  • Zhang Ningrong
  • Zhang Xingyuan
  • Wang Yuanyuan
Cryptography

Abstract

We report on the verification of a multi-party contract signing protocol described by Baum-Waidner and Waidner (BW). Based on Paulson's inductive approach, we give the protocol model that includes infinitely many signatories and contract texts signing simultaneously. We consider composite attacks of the dishonest signatory and the external intruder, formalize cryptographic primitives and protocol arithmetic including attack model, show formal description of key distribution, and prove signature key secrecy theorems and fairness property theorems of the BW protocol using the interactive theorem, prover Isabelle/HOL.

Key words

formal verification multi-party contract signing protocol inductive approach model 

CLC number

TP 393. 04 

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Copyright information

© Springer 2006

Authors and Affiliations

  1. 1.Institute of Command AutomationPLA University of Science and TechnologyNanjing, JiangsuChina

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