Efficient CCA-Secure CDH Based KEM Balanced between Ciphertext and Key
Efficient CCA-Secure CDH Based KEM Balanced between Ciphertext and Key
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DOI：
10.1007/978-3-642-22497-3_20
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发表时间：
2011-07
期刊：
影响因子：
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通讯作者：
Yamin Liu;Bao Li;Xianhui Lu;Dingding Jia
中科院分区：
文献类型：
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作者：
Yamin Liu;Bao Li;Xianhui Lu;Dingding Jia
在本文中，我们在标准模型中构造了一种高效的CCA安全密钥封装方案。新方案基于计算 Diffie-Hellman 假设和近年来广泛讨论的孪生技术。与以前的同类方案相比，新方案更加通用，并提供了一种通过改变参数来协调密文长度和密钥大小的简单方法。选择合理的参数值，可以实现密文长度和密钥大小之间的平衡。
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.