Paper 2004/127
DDH-based Group Key Agreement in a Mobile Environment
Junghyun Nam, Jinwoo Lee, Seungjoo Kim, and Dongho Won
Abstract
A group key agreement protocol is designed to efficiently implement secure multicast channels for a group of parties communicating over an untrusted, open network by allowing them to agree on a common secret key. In the past decade many problems related to group key agreement have been tackled and solved (diminished if not solved), and recently some constant-round protocols have been proven secure in concrete, realistic setting. However, all forward-secure protocols so far are still too expensive for small mobile devices. In this paper we propose a new constant-round protocol well suited for a mobile environment and prove its security under the Decisional Diffie-Hellman assumption. The protocol meets simplicity, efficiency, and all the desired security properties.
Metadata
- Available format(s)
-
PDF
PS
- Category
- Cryptographic protocols
- Publication info
- Published elsewhere. Unknown where it was published
- Keywords
- group key agreementmulticastsecurity modelDDH
- Contact author(s)
- jhnam @ dosan skku ac kr
- History
- 2004-12-08: last of 2 revisions
- 2004-06-03: received
- See all versions
- Short URL
- https://ia.cr/2004/127
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2004/127,
author = {Junghyun Nam and Jinwoo Lee and Seungjoo Kim and Dongho Won},
title = {{DDH}-based Group Key Agreement in a Mobile Environment},
howpublished = {Cryptology {ePrint} Archive, Paper 2004/127},
year = {2004},
url = {https://eprint.iacr.org/2004/127}
}
