关于高效的抗泄漏数字签名的设计的研究

项目名称： 关于高效的抗泄漏数字签名的设计的研究

项目编号： No.61472146

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 自动化技术、计算机技术

项目作者： 黄琼

作者单位： 华南农业大学

项目金额： 80万元

中文摘要： 传统密码学研究的焦点是方案设计上的安全，而非具体实现。新涌现的各种侧信道攻击使得敌手可以获得密码设备的内部秘密信息。许多原本设计上是安全的方案在这些攻击方式面前不再安全。为从根本上抵抗这些攻击，研究人员提出了抗泄漏密码学的概念，并构造了相应的密码系统，以填补因信息泄漏造成的安全性缺失。这些方案或者容许泄漏的信息较少，或者信息种类有限制，或者结构过于复杂，效率不高。在本课题中，我们将针对密码学的重要原语－数字签名－展开研究。我们探讨如何构造具有高泄漏率且效率更高的抗泄漏的签名方案，并探索构造它们的新方法。我们还将研究如何在更具一般性的泄漏模型，如辅助输入模型中构造具有自适应安全性的签名方案。其次，我们将对数字签名的常见变体进行研究，提出抗泄漏的群签名和环签名，并构造出相应的方案。最后，由于基于身份的加密可以用来构造签名，我们还将对该原语进行研究，提高抗泄漏的基于身份的加密方案的效率和泄漏率。

中文关键词： 数字签名；公钥密码学；基于身份的加密；标准模型；信息泄露

英文摘要： Traditional cryptography emphasizes on the design of cryptosystems, instead of the concrete implementation. However, the emerging side-channel attacks, allow the adversary to gain internal secret information of a cryptographic system, and renders many cryptosystems that are designed to be secure not secure any more. To resist these attacks, researchers proposed the notion of leakage-resilient cryptography and constructed corresponding cryptosystems, in order to fill in the security gap caused by information leakage. However, these schemes either torelate leakage of only a small fraction of the secret informaiton, or put restrictions on the type of leaked information, or are very complicated and thus not practically efficient. In this project we will investigate the construction of digital signature in the leakage resistant setting, which is an important cryptographic primitive. We will study the construction of leakage resistant signature schemes with high leakage ratio and better efficiency, as well as new approach to constructing this primitive. We will also investigate how to build leakage resistant signature schemes with adaptive security under more generic leakage model, for example, the auxiliary input model. Second, we will study the common variants of signatures, introduce the notions of leakage resistant group signature and ring signature, and propose their constructions. Furthermore, as identity-based encryption can be used to construct signature schemes, we will also investigate its construction, trying to improve the efficiency and leakage ratio.

英文关键词： Digital Signature;Public Key Cryptography;Identity-Based Encryption;Standard Model;Information Leakage