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Lecture notes in computer science

Attack on the Koyama-Ohta Identity Based Key Distribution Scheme

Yacov Yacobi

Published Jan 1, 1988• 13 citations
Publisher
DOI
10.1007/3-540-48184-2_37

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In order to hold secure electronic conference in communication networks via insecure channels, a conference key distribution system should be constructed. The conference key distribution system is used for distributing a conference key shared among the participants of the conference and hence secure communications are achieved. In this paper, by using the sealed lock, we propose an identity-based conference key distribution scheme with user anonymity. We also show that, our scheme not only withstands passive attack, impersonation attack, and conspiracy attack, but also provides forward security of the chairman. These properties make it quite effective and practical.
Fault-tolerance is an important property of conference key distribution protocol. Recently, Yang et al. proposed an identity-based fault-tolerant conference key distribution scheme which is much different to the traditional ones. But their scheme can not withstand passive attack and modification attack, moreover, it also can not provide forward security. An improved identity-based fault-tolerant conference key distribution scheme is proposed in this paper. Compared with the Yang et al. 's scheme, Tzeng's (2002) scheme and Xun's scheme, the new scheme has illustrated the highest security and its communication cost is intervenient Yang et al. 's scheme and Tzeng's (2002) scheme. As security is the first-line property in conference key establishment protocol, our scheme is the most practical one in the mass.