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Agreement protocols (2005).
| Content Provider | CiteSeerX |
|---|---|
| Author | Choo, Kim-Kwang Raymond |
| Abstract | Abstract. We revisit the password-based group key exchange protocol due to Lee et al. (2004), which carries a claimed proof of security in the Bresson et al. model under the intractability of the Decisional Diffie–Hellman problem (DDH) and Computational Diffie–Hellman (CDH) problem. We reveal a previously unpublished flaw in the protocol and its proof, whereby we demonstrate that the protocol violates the definition of security in the model. To provide a better insight into the protocol and proof failures, we present a fixed protocol. We hope our analysis will enable similar mistakes to be avoided in the future. We also revisit protocol 4 of Song and Kim (2000), and reveal a previously unpublished flaw in the protocol (i.e., a reflection attack). Key words: password-based key establishment protocols, key agreement protocols, provable security, information security. |
| File Format | |
| Publisher Date | 2005-01-01 |
| Access Restriction | Open |
| Subject Keyword | Fixed Protocol Password-based Group Key Exchange Protocol Proof Failure Provable Security Information Security Agreement Protocol Computational Diffie Hellman Reflection Attack Similar Mistake Password-based Key Establishment Protocol Unpublished Flaw Key Agreement Protocol Claimed Proof Decisional Diffie Hellman Problem Key Word |
| Content Type | Text |
