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Erschienen in:
2011 | OriginalPaper | Buchkapitel
Efficient CCA-Secure CDH Based KEM Balanced between Ciphertext and Key
verfasst von : Yamin Liu, Bao Li, Xianhui Lu, Dingding Jia
Erschienen in: Information Security and Privacy
Verlag: Springer Berlin Heidelberg
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In this paper we construct an efficient CCA-secure key encapsulation scheme in the standard model. The new scheme is based on the computational Diffie-Hellman assumption and the twinning technique, which has been widely discussed in recent years. Compared with previous schemes of the same kind, the new scheme is more generic, and offers a simple approach for reconciling ciphertext length and key size by altering a parameter. Choosing a reasonable value for the parameter, a balance between the ciphertext length and key size could be achieved.