Chameleon all-but-one extractable hash proof and its applications

Chameleon all-but-one extractable hash proof and its applications
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Chameleon 全部可提取哈希证明及其应用

DOI:
10.1007/s11432-017-9369-9
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发表时间:
2018-04
期刊:
SCIENCE CHINA Information Sciences
影响因子:
--
通讯作者:
Dong Zheng
Dong Zheng
中科院分区:
其他
文献类型:
--
作者:
Gang Han;Hui Li;Baodong Qin;Dong Zheng

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尊敬的编辑,我们将介绍变色龙的概念,但一个可提取的哈希证明(ABO-EHP)系统。它是一种特殊的ABO-EHP [1],其标记空间T由两个分支组成,记为TA × TB。具体地说,标签空间包含子集S T,并且满足所谓的变色龙性质。也就是说,对于任何a ∈ TA,存在唯一且特殊的B ∈ TB(通过陷门计算),使得(a,B)∈ S。利用变色龙的性质,我们可以直接从变色龙的ABO-EHP系统构造公钥加密方案,而不依赖于混合加密机制。当加密短消息时,例如PIN号码,在计算Diffie-Hellman(CDH)假设下,直接构造在某种意义上比[1 - 3]的混合加密方案更有效。本文首先给出了变色龙ABO-EHP系统的形式化定义。然后,我们展示了如何从变色龙ABOEHP系统构造一个选择密文安全(CCA)的PKE方案。最后,我们提出了实例的变色龙ABO-EHP系统构造高效的CCA安全的PKE方案。Chameleon ABO-EHP系统。首先,我们简要回顾一下将用于变色龙ABO-EHP系统的二元关系的定义。
Dear editor, We will introduce the notion of chameleon All-But-One Extractable Hash Proof (ABO-EHP) system. It is a special kind of ABO-EHP [1] with a tag space T that comprises two branches, denoted by TA× TB. Specifically, the tag space contains a subset S⊂ T and satisfies the so-called chameleon property. That is, for any a∈ TA, there is a unique and special b∈ TB (computed via a trapdoor) making (a, b)∈ S. The chameleon property allows us to construct public-key encryption (PKE) schemes from chameleon ABO-EHP systems directly, not relying on hybrid encryption mechanism. When encrypting short messages, eg, a PIN number, the direct construction in some sense is more efficient than the hybrid encryption schemes of [1–3] under the computational Diffie-Hellman (CDH) assumption. In the following, we first give a formal definition of chameleon ABO-EHP system. Then, we show how to construct a chosen-ciphertext secure (CCA) PKE scheme from a chameleon ABOEHP system. Finally, we present instantiations of chameleon ABO-EHP system for constructing efficient CCA-secure PKE schemes. Chameleon ABO-EHP system. First, we briefly recall the definition of binary relations that will be used in the chameleon ABO-EHP system.
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