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Key Agreement for Key Hypergraph
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- Authors
- Ik Rae Jeong, Dong Hoon Lee
- Issue Date
- 2007-12
- Citation
- Computers & Security, v.26, no.7-8, pp.452-458
- ISSN
- 0167-4048
- Publisher
- Elsevier Advanced Technology
- Language
- English
- Type
- Journal Article
- Abstract
- In this paper, we propose a key agreement protocol for a key hypergraph. In a key hypergraph, a party is represented as a vertex and a group of parties is represented as a hyperedge.A key agreement protocol for a key hypergraph establishes all the keys for hyperedges in a key hypergraph at the same time. A naive approach would be to run a group key protocol concurrently for each hyperedge. By using the randomness re-use technique, we propose an efficient key agreement protocol for a key hypergraph, which is of two rounds.We formalize the key exchange model for a key hypergraph which is an extension of a group key exchange model and especially incorporates insider attacks. The proposed key agreement protocol for a key hypergraph provides key independence and forward secrecy in the random oracle model under the computational Diffie-Hellman assumption.