The Research On ID-based Key Agreement Protocols In Wireless Network

Wireless network is more and more taken attention because it isflexible, not limited by terrain and easy to migrate. In the wirelessnetwork, the properties of mobility, opening and instability make thePKI-based cryptosystem hard to be used since such cryptosystem usesmore net-bandwidth and wastes more system sources to managecertificates. By contrast, the ID-based cryptosystem can decrease the costof key management.Key establishment is a process to establish an ephemeral session keyon open networks for two or more participants and an importantmechanism to ensure the security of subsequent communication. Usingthe session key generated by key establishment protocols, the participantscan get a secure channel so that it can realize the security of transmissionof information. The ID-based key agreement protocols avoid thedisadvantages of keeping certificate database by CA which wastes muchtime and sources. These merits make ID-based key agreement protocolsbeing the concern. The main works in this thesis are listed as follows:The thesis propose a new ID-based group authenticated keyagreement protocol. In this protocol, we consider the dynamic propertyfor group members completely. We also give a formal security proof forthe new protocol in standard model based on the DBDH assumption.The ID-based key agreement protocol using the elliptic curvecryptosystem proposed by J. Oh et al. in2007is analyzed and we findthat this protocol is vulnerable to basic impersonation attack and keycompromise impersonation attack, we describe these security flaws andpropose an improvement version, we also analyze the security of our newprotocol.