Abstract
In this paper, we present an identity-based explicit authenticated key agreement protocol that is provably secure without random oracles. The protocol employs a new method to isolate a session key from key confirmation keys so that there is no direct usage of hash functions in the protocol. The protocol is proved secure without random oracles in a variant of Bellare and Rogaway style model, an exception to current proof method in this style model in the ID-based setting. We believe that this key isolation method is novel and can be further studied for constructing more efficient protocols.
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This work is supported by the National Natural Science Foundation of China under Grant No. 60473027, and also by Sun Yat-Sen University under Grant Nos. 35000-2910025 and 35000-3171912.
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Tian, HB., Susilo, W., Ming, Y. et al. A Provable Secure ID-Based Explicit Authenticated Key Agreement Protocol Without Random Oracles. J. Comput. Sci. Technol. 23, 832–842 (2008). https://doi.org/10.1007/s11390-008-9178-z
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DOI: https://doi.org/10.1007/s11390-008-9178-z