On the Security of an  Efficient Group Key Agreement Scheme for  MANETs

Purushothama B R; Nishat Koti

Paper 2015/177

On the Security of an Efficient Group Key Agreement Scheme for MANETs

Purushothama B R and Nishat Koti

Abstract

Yang et al. have proposed an efficient group key agreement scheme for Mobile Adhoc Networks. The scheme is efficient as only one bilinear computation is required for group members to obtain the session key. The scheme is analyzed for security without random oracle model. However, we prove that their scheme is not secure. In particular, we show that any passive adversary (or non-group member) can compute the session key without having access to the individual secret keys of the group members. Hence, Yang et al. scheme cannot be used for secure group communication. We also show that, the scheme cannot be used for secure group communication unless there exists a central entity, and hence cannot be used for secure communication in mobile adhoc networks.

Metadata

Available format(s): PDF
Category: Cryptographic protocols
Publication info: Preprint.
Keywords: key management
Contact author(s): puru @ nitgoa ac in
History: 2015-03-01: received
Short URL: https://ia.cr/2015/177
License: CC BY

BibTeX

@misc{cryptoeprint:2015/177,
      author = {Purushothama B R and Nishat Koti},
      title = {On the Security of an  Efficient Group Key Agreement Scheme for  MANETs},
      howpublished = {Cryptology ePrint Archive, Paper 2015/177},
      year = {2015},
      note = {\url{https://eprint.iacr.org/2015/177}},
      url = {https://eprint.iacr.org/2015/177}
}