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国家自然科学基金(s60573030)

作品数:2 被引量:0H指数:0
发文基金:国家自然科学基金国家重点基础研究发展计划国家高技术研究发展计划更多>>
相关领域:自动化与计算机技术更多>>

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Formal Analysis of Authentication in 802.11i
2009年
Authentication is the basis of the security of IEEE 802.11i standard. The authentication process in 802.11i involves two important protocols: a 4-way handshake and a group key handshake. A formal analysis of authentication in 802.11i is given via a belief multisets formalism. The analysis shows that the 4-way handshake and the group key handshake may provide satisfactory mutual authentication, key management, and issue of a new group temporal key from an access point to a user device, under the guarantee of mutual possession of a confidential palrwise master key. The analysis also shows that there exists a denial of service attack in the 4-way handshake and some seeming redundancies are useful in the protocol implementation.
董玲陈克非来学嘉
关键词:AUTHENTICATION
Universally Composable Proactive Threshold RSA Signature
2008年
Recently some efforts were made towards capturing the security requirements within the composable security framework. This modeling has some significant advantages in designing and analyzing complex systems. The threshold signature was discussed and a definition was given based on the universal composability framework, which is proved to be equivalent to the standard security definition. Furthermore, a simple, efficient and proactive threshold RSA signature protocol was presented. It is proved to be correct, consistent and unforgeable relative to the environment that at most t - 1 parties are corrupted in each proactive stage. It is also secure under the universal composability framework. It is a UC based security and is proved to be equivalent to the standard security.
洪璇陈克非龙宇
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