项目名称: 格基密钥的高效提取及格上身份基密码的新型设计
项目编号: No.61303198
项目类型: 青年科学基金项目
立项/批准年度: 2014
项目学科: 自动化技术、计算机技术
项目作者: 王凤和
作者单位: 山东建筑大学
项目金额: 23万元
中文摘要: 针对身份基(Id-based)格公钥密码存在存储空间大、计算效率低、实现密码功能有限等不足,本课题拟开展身份基格公钥密码方案的高效设计研究和高级身份基应用方案的设计研究。研究内容包括:设计新型、高效的格基密钥提取协议,形成和完善以"多比特赋值"的方法设计密钥提取协议的理论和技术体系,进而实现格上标准模型下安全身份基加密(Id-based encryption,IBE)和身份基签名(Id-based signature,IBS)方案的设计,提高其实现效率并完成安全证明;开展格上IBS的应用研究,在基于身份环境下构造格上能够实现特殊密码性质的数字签名方案;开展格上IBE的应用研究,基于格密码工具实现身份基广播加密、签密的设计。课题力争在标准模型下(Hierarchical)IBE(IBS)的实现效率方面形成一定的突破,为格上高效身份基密码提供可能的解决方案。
中文关键词: 格密码;身份基密码;标准模型;多比特赋值;
英文摘要: Since the identity-based cryptography (IBC) over lattice is inefficient about the space size and computation cost, this project centers on the design of the efficient lattice-based IBC systems, at the same time, this project also discusses the design of the id-based cryptosystems with added characters. The main work of this project is as shown as follows: 1. An efficient and novel lattice-based key extract algorithm would be designed, which can work without using the "bit-by-bit assignment rule", and then the efficient id-based encryption and id-based signature schemes can be achieved by the novel assignment rule.2. Design Id-based signature schemes with added character by lattice-based cryptographic tool. 3. Design id-based broadcast encryption and signcryption systems based on lattice cryptographic tool. This project wishs to make progress about the efficiency of the (Hierarchical)IBE(IBS) systems over lattice. If it is smoothly, the project would give an efficient IBC scheme.
英文关键词: Lattice-based cryptography;Identity-based cryptography;Standard model;More bits assignment rule;