Cryptanalysis of a group key establishment protocol

Jorge Martinez Carracedo, Adriana Suarez Corona

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In this paper, we analyze the security of a group key establishment scheme proposed by López-Ramos et al. This proposal aims at allowing a group of users to agree on a common key. We present several attacks against the security of the proposed protocol. In particular, an active attack is presented, and it is also proved that the protocol does not provide forward secrecy.

Original languageEnglish
Article number332
Pages (from-to)1-10
Number of pages10
Issue number2
Publication statusPublished (in print/issue) - 17 Feb 2021

Bibliographical note

Funding Information:
Funding: This research was funded in part through research project MTM2017-83506-C2-2-P by the Spanish MICINN.

Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Copyright 2021 Elsevier B.V., All rights reserved.


  • Cryptanalysis
  • Group Key Establishment
  • Group key establishment


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