控制验证权数字签名体制设计研究

项目名称： 控制验证权数字签名体制设计研究

项目编号： No.61202438

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 计算机科学学科

项目作者： 明洋

作者单位： 长安大学

项目金额： 22万元

中文摘要： 保护隐私信息安全是电子商务、电子政务活动中亟待解决的问题，控制验证权签名是解决该问题的关键技术。本项目从签名独立验证和联合验证两个角度系统研究控制验证权签名，具体包括：利用Waters和Gentry思想、双系统加密技术构造标准模型下安全且同时满足短系统参数、紧密安全归约和弱安全假设控制验证权签名；利用格基扩张和随机化技术，设计基于格中困难问题下的控制验证权签名，为后量子密码时代隐私信息安全提供解决思路；探索弹性泄露控制验证权签名的设计和可证明安全性，给隐私信息保护技术的具体实现提供理论依据；通过验证方程中引入验证者私钥独立因子，利用承诺技术和变色龙哈希函数构造证实和否认协议，彻底解决(广义)指定验证者签名的不可授权性和不可否认性问题。本项目的研究有助于进一步完善数字签名验证的控制问题，推动公钥密码学和可证明安全理论的研究，对复杂网络社会中隐私信息安全的保护具有重要的理论意义和现实价值。

中文关键词： 数字签名；控制验证权签名；指定验证者签名；标准模型；可证安全

英文摘要： Digital signature scheme with verification right control is a key technology to solve the protecting the security of private information in E-commerce and E-government. In this subject, we systematic study signature scheme with verification right control from the independent and joint verification of signature. The main research contents include: Based on Waters's and Gentry's idea, dual system encryption technique, the signature with verification right control is proposed. The new scheme is provably secure in the standard model which captures short system parameters, tighter secure reduction and weak secure assumption; Using the lattice basis delegation and randomness technique, the provable secure lattice-based signature with verification right control is present, which provide a solving thoughts about the security of private information in Post-Quantum Cryptography; Exploration of design and security proof for the leakage-resilient signature scheme with verification right control, which provide theoretical basis for the implementation of private information protection; By introducing the independent factor in verification equation and using confirm and disavow protocols via commitment scheme and chameleon hash function, the universal designated verifier signature scheme is put forward, which is to thoroughly

英文关键词： Digital signature；Signature with verification right control；Designated verified signature；Standard model；Provably security