Paper 2009/291 Original: eprint.iacr.org/2009/291 ↗
Modeling Key Compromise Impersonation Attacks on Group Key Exchange Protocols
Abstract
A key exchange protocol allows a set of parties to agree upon a secret session key over a public network. Two-party key exchange (2PKE) protocols have been rigorously analyzed under various models considering different adversarial actions. However, the analysis of group key exchange (GKE) protocols has not been as extensive as that of 2PKE protocols. Particularly, the security attribute of key compromise impersonation (KCI) resilience has so far been ignored for the case of GKE protocols. We first model the security of GKE protocols addressing KCI attacks by both outsider and insider adversaries. We then show that a few existing protocols are not secure even against outsider KCI attacks. The attacks on these protocols demonstrate the necessity of considering KCI resilience for GKE protocols. Finally, we give a new proof of security for an existing GKE protocol under the revised model assuming random oracles.
Metadata
- Available format(s)
PDF- Category
- Cryptographic protocols
- Publication info
- Preprint.
- History
- 2009-06-17: last updated
- 2009-06-17: published
- Short URL
- https://ia.cr/2009/291
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2009/291,
author = {M. Choudary Gorantla and Colin Boyd and Juan Manuel González Nieto},
title = {Modeling Key Compromise Impersonation Attacks on Group Key Exchange Protocols},
howpublished = {Cryptology {ePrint} Archive, Paper 2009/291},
year = {2009},
url = {https://eprint.iacr.org/2009/291}
}