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Continuous Leakage-Resilient Identity-Based Encryption Scheme with CCA Security

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Chinese Journal of Electronics 2019年第4期28卷 682-689页

作者： zhou yanwei YANG Bo Engineering Laboratory of Teaching Information Technology of Shaanxi Province Shaanxi Normal University School of Computer Science Shaanxi Normal University State Key Laboratory of Information Security Institute of Information Engineering

Leakage of private information including private key has become a threat to the security of computing systems. It has become a common security requirement that a cryptographic scheme should withstand various leakage attacks, including continuous leakage attacks. In order to obtain an Identity-based encryption(IBE) scheme which can keep its original security in the continuous leakage setting, we propose a new construction method of IBE scheme with Chosen-ciphertext attacks(CCA) security, which can tolerate continuous leakage attacks on many private keys of each identity, and whose security is proved based on the hardness of the classical Decisional bilinear Diffie-Hellman(DBDH) assumption in the standard model. The leakage parameter is independent of the plaintext space and has the constant size.

关键词： Continuous leakage-resilience Identity based encryption CCA security Standard model

Attribute-Based Worker Selection Scheme by Using Blockchain in Decentralized Crowdsourcing Scenario

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Chinese Journal of Electronics 2021年第2期30卷 249-257页

作者： YANG Qiliang ZHANG Mingrui zhou yanwei YU Yong School of Computer Science Shaanxi Normal University Guangxi Key Laboratory of Trusted Software Guilin University of Electronic Science and Technology

Traditional crowdsourcing based on centralized management platform is vulnerable to Distributed denial of service(DDo S) attack and single point of *** blockchain technology with crowdsourcing can well solve the above problems, enabling users to realize peer-to-peer transactions and collaboration based on decentralized trust in distributed systems where nodes do not need to trust each other. Although the current methods have solved the above problems, task publishers select workers based on their reputation values, which has two disadvantages: subjectivity and difficulty in initial value setting. Due to the complexity of crowdsourcing network, there will be malicious users in the *** requirement for anonymity protects both legitimate and malicious users. In order to solve these problems, we propose an attribute-based worker selection scheme using the private set intersection technology. Our scheme also realizes the malicious user identity disclosure function. A concrete example of our scheme is given.

关键词： malicious user identity disclosure function DDoS attack computer network security blockchains decentralized trust decentralized crowdsourcing scenario attribute-based worker selection scheme peer-to-peer transactions peer-to-peer computing private set intersection technology crowdsourcing distributed systems blockchain technology centralized management platform personnel distributed denial of service attack data privacy

Zero-Cerd: A Self-Blindable Anonymous Authentication System Based on Blockchain

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Chinese Journal of Electronics 2023年第3期32卷 587-596页

作者： YANG Kunwei YANG Bo WANG Tao zhou yanwei School of Computer Science Shaanxi Normal University

While the Internet of things brings convenience to people’s lives, it will also bring people hidden worries about data security. As an important barrier to protect data security, identity authentication is widely used in the Internet of things. However, it is necessary to protect users’ identity privacy while authenticating their identity. Anonymous authentication technology is often used to solve the contradiction between legitimacy and privacy in the authentication process. The existing anonymous authentication scheme has many problems in practical application such as the inability to achieve complete anonymity, the high computational complexity of the algorithm, and the corruption of the central authority. Aiming at the privacy of authentication, we propose Zero-Cerd, a self-blindable anonymous authentication system based on blockchain and dynamic accumulator. The self-blinding properties of the credential enable the users themselves to generate a new validly pseudonymous credential. With the help of zero-knowledge proof technology, users can prove the validity of their credentials without disclosing any information. Security analysis shows that our scheme has achieved the expected security objectives. Compared with the existing schemes, our scheme has the advantages of complete anonymity and high efficiency, and is more suitable for IoT applications with privacy protection requirements.

关键词： Privacy Analytical models Data security Heuristic algorithms Authentication Blockchains Internet of Things

A Novel Construction of Updatable Identity-Based Hash Proof System and Its Applications

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Chinese Journal of Electronics 2023年第3期32卷 564-576页

作者： QIAO Zirui zhou yanwei YANG Bo ZHANG Wenzheng ZHANG Mingwu School of Computer Science Shaanxi Normal University State Key Laboratory of Cryptology Science and Technology on Communication Security Laboratory Henan Key Laboratory of Network Cryptography Technology School of Computere Hubei University of Technology

In the previous works, to further provide the continuous leakage resilience for the identity-based encryption scheme, a new cryptography primitive, called updatable identity-based hash proof system(U-IB-HPS),was proposed. However, most of the existing constructions have some deficiencies, they either do not have perfect key update function or the corresponding security with tight reduction relies on a non-static complexity assumption. To address the above problems, a new construction of U-IB-HPS is created, and the corresponding security of our system is proved based on the static complexity assumption. Also, the corresponding comparisons and analysis of performances show that our proposal not only achieves the perfect key update function and the anonymity, but also has the tight security reduction. In additional, our proposal achieves the same computational efficiency as other previous systems. To further illustrate the practical function of U-IB-HPS, a generic method of non-interactive data authorization protocol with continuous leakage resilience is designed by employing U-IB-HPS as an underlying tool, which can provide continuous leakage-resilient data authorization function for the cloud computing. Hence, the application field of U-IB-HPS is further extended through our study.

关键词： Authorization Cloud computing Protocols Identity-based encryption Complexity theory Computational efficiency Proposals

来自未来的怀旧——《流浪地球》的中国式视效景观的制造逻辑

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北京电影学院学报 2019年第9期 22-31页

作者：周延伟南开大学文学院

作为中国科幻电影的类型化奠基之作,《流浪地球》表达了硬核的东方价值,形塑了末世逃亡的中国式视效景观。可以说,由中国元素组合而成的视觉特效在很大程度上成了决定该片成功的关键因素。经元素整理后发现,影片通过传统元素和现代元素... 详细信息

作为中国科幻电影的类型化奠基之作,《流浪地球》表达了硬核的东方价值,形塑了末世逃亡的中国式视效景观。可以说,由中国元素组合而成的视觉特效在很大程度上成了决定该片成功的关键因素。经元素整理后发现,影片通过传统元素和现代元素的绞合塑造了地下城生活、地表新秩序以及都市废墟三处典型的中式景观。这些未来与现实并置的悖论式景观以怀旧作为内在的建构机制,通过修复型怀旧和反思型怀旧两种场景建构策略使观众不自觉地占据了影片预设的怀旧者位置,从而引发了观众的情感共鸣。这种怀旧机制的发生根源于全球文化与地方文化的相互博弈,表现为在使用全球语言表达地方文化的过程中所呈现出的视觉相似性。

关键词：怀旧中国式视效景观《流浪地球》制造逻辑

被展示的文化:关于文化导向型城市更新中特色塑造策略的思考

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装饰 2018年第11期 108-111页

作者：周延伟南开大学文学院

塑造地方特色是文化导向型城市更新的重要官方话语,也是城市空间设计的重要目标。这一更新模式将可参观的文化作为核心的设计策略,通过主题化和重塑历史传统来塑造地方差异,实际上是将文化变成可参观的展示综合体,但设计结果往往呈现为... 详细信息

塑造地方特色是文化导向型城市更新的重要官方话语,也是城市空间设计的重要目标。这一更新模式将可参观的文化作为核心的设计策略,通过主题化和重塑历史传统来塑造地方差异,实际上是将文化变成可参观的展示综合体,但设计结果往往呈现为异质与同化并存的无地方性空间。其根源于资本的全球化,体现为对资本既抵抗又利用的矛盾态度,同时又受到现代主义规划设计思想、文脉传承的人为选择性以及设计创作的互文性等因素的影响。因此,城市更新的对象应从抽象的"空间"转向人性的"地方"。

关键词：文化导向城市更新特色塑造设计策略

Self-compacting Concrete-filled Steel Tubes Prepared from Manufactured Sand with a High Content of Limestone Fines

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Journal of Wuhan University of Technology(Materials Science) 2011年第2期26卷 326-329页

作者：李北星 Key Laboratory of Silicate Materials Science and Engineering of Ministry of Education Wuhan University of Technology

To meet the requirements of construction of concretes filled in the steel tube arches,a C60 grade micro-expansive self-compacting concrete （SCC） was prepared from manufactured sand （MS）.The utilization of MS with a high content of quarry limestone fines was dealed for SCC *** workability,compressive and splitting strength,modulus of elasticity,restrained expansion and chloride ion permeability as well as freeze-thaw resistance of three MS-SCC mixes with fines content of 3%,7% and 10% were tested and compared with those of the natural sand （NS）-SCC *** experimental results indicate that the performances of the C60 MS-SCC with fines content of 7% are excellent and compared favorably with those of C60 NS-SCC.

关键词： self-compacting concrete manufactured sand quarry fines performances

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可证安全的高效无证书签名方案

陕西师范大学学报（自然科学版） 2017年第5期45卷 17-22页

作者：周彦伟李骏陕西师范大学计算机科学学院陕西西安710119 现代教学技术教育部重点实验室陕西西安710062

针对现有基于双线性映射的无证书签名方案存在计算效率低的不足,提出了可证安全的高效无证书签名方案,并在随机谕言机模型下基于离散对数困难性问题证明了该方案的不可伪造性。相较与现有的无证书签名方案而言,本文方案具有更高的计算效... 详细信息

针对现有基于双线性映射的无证书签名方案存在计算效率低的不足,提出了可证安全的高效无证书签名方案,并在随机谕言机模型下基于离散对数困难性问题证明了该方案的不可伪造性。相较与现有的无证书签名方案而言,本文方案具有更高的计算效率,该方案具有安全、高效和无证书管理的特点,可广泛应用于电子商务、电子投票等领域。

关键词：无证书签名方案随机谕言机模型无双线性配对

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三峡工程船闸闸室直立坡锚固监测成果分析

水力发电 2007年第12期33卷 73-75页

作者：周严伟徐波中国长江电力股份有限公司湖北宜昌443002

为了保证三峡双线五级船闸闸室直立坡施工期安全,了解岩体变形情况,对其锚索、锚杆锚固状态进行了安全监测分析。分析认为,其锚索锚固力变化总体上分为速损期、波动期和平稳期三个阶段,锚索锚固力和锚杆应力主要受闸室开挖后岩体变形影... 详细信息

为了保证三峡双线五级船闸闸室直立坡施工期安全,了解岩体变形情况,对其锚索、锚杆锚固状态进行了安全监测分析。分析认为,其锚索锚固力变化总体上分为速损期、波动期和平稳期三个阶段,锚索锚固力和锚杆应力主要受闸室开挖后岩体变形影响。目前直立坡北坡锚索测力计平均损失率13.2%,中隔墩锚索测力计平均损失率9.3%,南坡锚索测力计平均损失率11.9%,直立坡锚杆应力一般在50 MPa以下。分析结果表明,锚索、锚杆在加固直立坡稳定方面作用显著,闸室直立坡处于稳定状态。

关键词：锚索锚杆安全监测双线五级船闸闸室直立坡三峡工程