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arXiv 1302.0347cs.CRcs.ITmath.IT
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标准模型下McEliece密码体制的一种有效的CCA2-Secure变形

An Efficient CCA2-Secure Variant of the McEliece Cryptosystem in the Standard Model

Roohallah Rastaghi

摘要:

最近,在标准模型中的McEliece公钥加密(PKE)方案的几个选择密文安全(CCA 2-安全)变体被引入。所有的方案都是基于加密重复范式,并使用从CPA安全方案到CCA 2安全方案的一般转换。因此,所得到的加密方案需要\textit{separate}加密,并且与原始方案相比具有\textit{large}密钥大小,这在基于代码的PKE方案中复杂的公钥大小问题。因此,所提出的方案在实际中使用时不够有效。在这项工作中,我们提出了一个有效的CCA 2-安全的McEliece PKE计划的标准模型的变种。主要的新颖性是,与以前的方法不同,我们的方法是一个通用的转换,并可以应用到\textit{any}单向陷门函数(OW-TDF),最低级别的安全概念的上下文中的公钥密码学,解决了一个大的基本和核心问题,在过去的二十年中仍然没有解决。

英文摘要:

Recently, a few chosen-ciphertext secure (CCA2-secure) variants of the McEliece public-key encryption (PKE) scheme in the standard model were introduced. All the proposed schemes are based on encryption repetition paradigm and use general transformation from CPA-secure scheme to a CCA2-secure one. Therefore, the resulting encryption scheme needs \textit{separate} encryption and has \textit{large} key size compared to the original scheme, which complex public key size problem in the code-based PKE schemes. Thus, the proposed schemes are not sufficiently efficient to be used in practice. In this work, we propose an efficient CCA2-secure variant of the McEliece PKE scheme in the standard model. The main novelty is that, unlike previous approaches, our approach is a generic conversion and can be applied to \textit{any} one-way trapdoor function (OW-TDF), the lowest-level security notion in the context of public-key cryptography, resolving a big fundamental and central problem that has remained unsolved in the past two decades.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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