检索结果-内蒙古大学图书馆

ciphertext-policy attribute-based encryption with Short Keys

Chinese Journal of Electronics 2014年第4期23卷 655-660页

作者： XU Peng TANG Yong JIANG Wenbin JIN Hai ZOU Deqing Services Computing Technology and System Lab Cluster and Grid Computing Lab School of Computer Science and Technology Huazhong University of Science and Technology

ciphertext-policy attribute-based encryption(CP-ABE)allows a user with some attributes to decrypt the ciphertexts associated with these *** several CP-ABE schemes with the constant size ciphertext were proposed to reduce the communication cost,their master public and secret keys still have the size linear in the total number of *** schemes are unpractical for the attribute-scalable and many-attributes scenario.A new CP-ABE scheme is *** attribute is mapped to a mathematical value by a combination *** master public and secret keys of the proposed CP-ABE scheme have the size linear in the binary size of a hash function’s *** has the comparable performance with existing schemes in the aspects like the time costs of encryption and decryption,the expressiveness of access policy and the provable security.

关键词： ciphertext-policy attribute-based encryption Expressiveness policy Provable security

来源：评论

学校读者我要写书评

暂无评论

ciphertext-policy attribute-based encryption for General Circuits from Bilinear Maps

引用

Wuhan University Journal of Natural Sciences 2017年第2期22卷 171-177页

作者： HU Peng GAO Haiying School of Information Security Zhengzhou Information and Technology Institute Zhengzhou 450004 Henan China

In this paper, we present the first ciphertext-policy attribute-based encryption （CP-ABE） scheme for polynomial-size general circuits based on bilinear maps which is more suitable for practical use and more efficient than multilinear maps. Our scheme uses a top-down secret sharing and FANOUT gate to resist the ＂backtracking attack＂ which is the main barrier expending access tree to general circuit. In the standard model, selective security of our scheme is proved. Comparing with current scheme for general circuits from bilinear maps, our work is more efficient.

关键词： ciphertext-policy attribute-based encryption general circuits bilinear maps selective security

来源：评论

学校读者我要写书评

暂无评论

Puncturable ciphertext-policy attribute-based encryption scheme for efficient and flexible user revocation

引用

Science China(Information Sciences) 2023年第7期66卷 130-146页

作者： Dilxat GHOPUR Jianfeng MA Xindi MA Yinbin MIAO Jialu HAO Tao JIANG School of Cyber Engineering Xidian University Guangxi Key Laboratory of Trusted Software Guilin University of Electronic Technology Xi'an Satellite Control Center

With the rapid deployment of storage services, secure and efficient user authorization and revocation data shared through the cloud have become a grand challenge hindering cloud data *** previous direct and indirect user revocation schemes implemented large-scale user revocation, they faced heavy communication and computational costs. To address these challenges, this study presents a new encryption scheme that combines ciphertext-policy attribute-based encryption(CP-ABE) with puncturable encryption to achieve efficient and flexible user revocation. We design a proxy server to reduce the computational overhead in the decryption phase. Because the puncture process is performed on a semi-honest cloud, we use the digital signature method to verify the correctness of its operation. Furthermore, we prove the security of our scheme under the chosen-plaintext attack(CPA), and compare it with other schemes to highlight its advantages. Numerical analysis and experimental simulation results reveal that our scheme is more suitable than other schemes for use in a cloud environment for user revocation.

关键词： ciphertext-policy attribute-based encryption puncturable encryption user revocation outsource decryption digital signature

来源：评论

学校读者我要写书评

暂无评论

Reversible Data Hiding Algorithm in Encrypted Images based on Adaptive Median Edge Detection and ciphertext-policy attribute-based encryption

引用

Computers, Materials & Continua 2024年第10期81卷 1123-1155页

作者： Zongbao Jiang Minqing Zhang Weina Dong Chao Jiang Fuqiang Di Key Laboratory of Network and Information Security of People’s Armed Police Chinese People’s Armed Police Force Engineering UniversityXi’an710086China

With the rapid advancement of cloud computing technology,reversible data hiding algorithms in encrypted images(RDH-EI)have developed into an important field of study concentrated on safeguarding privacy in distributed cloud ***,existing algorithms often suffer from low embedding capacities and are inadequate for complex data access *** address these challenges,this paper proposes a novel reversible data hiding algorithm in encrypted images based on adaptive median edge detection(AMED)and ciphertext-policy attributebased encryption(CP-ABE).This proposed algorithm enhances the conventional median edge detection(MED)by incorporating dynamic variables to improve pixel prediction *** carrier image is subsequently reconstructed using the Huffman coding *** image generation is then achieved by encrypting the image based on system user attributes and data access rights,with the hierarchical embedding of the group’s secret data seamlessly integrated during the encryption process using the CP-ABE ***,the encrypted image is transmitted to the data hider,enabling independent embedding of the secret data and resulting in the creation of the marked encrypted *** approach allows only the receiver to extract the authorized group’s secret data,thereby enabling fine-grained,controlled *** results indicate that,in contrast to current algorithms,the method introduced here considerably improves the embedding rate while preserving lossless image ***,the average maximum embedding rates for the(3,4)-threshold and(6,6)-threshold schemes reach 5.7853 bits per pixel(bpp)and 7.7781 bpp,respectively,across the BOSSbase,BOW-2,and USD ***,the algorithm facilitates permission-granting and joint-decryption ***,this paper conducts a comprehensive examination of the algorithm’s robustness using metrics such as image correlation,information entropy,and number of pix

关键词： ciphertext-policy attribute-based encryption complex data access structure reversible data hiding large embedding space

来源：评论

学校读者我要写书评

暂无评论

An Efficient ciphertext-policy attribute-based encryption Scheme with policy Update

引用

Computers, Materials & Continua 2020年第5期63卷 1031-1041页

作者： Changji Wang Yuan Yuan School of Information Science and Technology Guangdong University of Foreign StudiesGuangzhou510006China School of Mathematics and Statistics Guangdong University of Foreign StudiesGuangzhou510006China

ciphertext-policy attribute-based encryption(CP-ABE)is a promising cryptographic solution to the problem for enforcing fine-grained access control over encrypted data in the ***,when applying CP-ABE to data outsourcing scenarios,we have to address the challenging issue of policy updates because access control elements,such as users,attributes,and access rules may change *** this paper,we propose a notion of access policy updatable ciphertext-policy attribute-based encryption(APU-CP-ABE)by combining the idea of ciphertext-policy attribute-based key encapsulation and symmetric proxy *** an access policy update occurs,data owner is no longer required to download any data for re-encryption from the cloud,all he needs to do is generate a re-encryption key and produce a new encapsulated symmetric key,and then upload them to the *** cloud server executes re-encryption without *** the re-encrypted ciphertext is encrypted under a completely new key,users cannot decrypt data even if they keep the old symmetric keys or parts of the previous *** present an APU-CP-ABE construction based on Syalim et al.’s[Syalim,Nishide and Sakurai(2017)]improved symmetric proxy re-encryption scheme and Agrawal et al.’s[Agrawal and Chase(2017)]attribute-based message encryption *** requires only 6 bilinear pairing operations for decryption,regardless of the number of attributes *** makes our construction particularly attractive when decryption is time-critical.

关键词： ciphertext-policy attribute-based encryption key encapsulation mechanism access structure all-or-nothing transform cloud computing

来源：评论

学校读者我要写书评

暂无评论

Efficient and Secure ciphertext-policy attribute-based encryption Without Pairing for Cloud-Assisted Smart Grid

引用

IEEE ACCESS 2020年 8卷 40704-40713页

作者： Wang, Yong Chen, Biwen Li, Lei Ma, Qiang Li, Huicong He, Debiao State Grid Shandong Elect Power Co Jinan 250001 Peoples R China Wuhan Univ Sch Comp Sci Wuhan 430072 Peoples R China Wuhan Univ Sch Cyber Sci & Engn Wuhan 430072 Peoples R China

Cloud-assisted smart grid has been broadly deployed to improve the economics, efficiency, sustainability, and reliability of electricity services. The new revolution of technology will also bring new challenges to data security, particularly data confidentiality. As a promising encryption method for supporting fine-grained access control, attribute-based encryption (ABE) is widely given attention by the academia and industry. However, most existing schemes suffer from the efficiency problem limiting its deployment for the cloud-assisted smart grid, especially for resource-limited users. To address this problem, this paper proposes two efficient pairing-free ciphertext-policy attribute-based schemes that eliminate the computation-intensive bilinear pairing operation. The basic scheme only uses some simple scalar multiplications based on elliptic curves, and the enhanced scheme provides an important usability feature, namely the users and attributes revocation. The security of the proposed schemes is reduced to the elliptic curve decisional Diffie-Hellman problem. Finally, the performance analysis and extensive experiments demonstrate that our proposed schemes are suitable for the cloud-assisted smart grid.

关键词： encryption Smart grids Access control Cloud computing Elliptic curves Cloud-assisted smart grid access control ciphertext-policy attribute-based encryption pairing-free

来源：评论

学校读者我要写书评

暂无评论

A break-glass protocol based on ciphertext-policy attribute-based encryption to access medical records in the cloud

引用

ANNALS OF TELECOMMUNICATIONS 2020年第3-4期75卷 103-119页

作者： de Oliveira, Marcela T. Bakas, Alexandros Frimpong, Eugene Groot, Adrien E. D. Marquering, Henk A. Michalas, Antonis Olabarriaga, Silvia D. Univ Amsterdam Amsterdam Univ Med Ctr Amsterdam Netherlands Tampere Univ Tampere Finland

In emergency care, fast and efficient treatment is vital. The availability of Electronic Medical Records (EMR) allows healthcare professionals to access a patient's data promptly, which facilitates the decision-making process and saves time by not repeating medical procedures. Unfortunately, the complete EMR of a patient is often not available during an emergency situation to all treatment teams. Cloud services emerge as a promising solution to this problem by allowing ubiquitous access to information. However, EMR storage and sharing through clouds raise several concerns about security and privacy. To this end, we propose a protocol through which all treatment teams involved in the emergency care can securely decrypt relevant data from the patient's EMR and add new information about the patient's status. Furthermore, our protocol ensures that treatment teams will only access the patient's EMR for the period during which the patient is under their care. Finally, we present a formal security analysis of our protocol and some initial experimental results.

关键词： ciphertext-policy attribute-based encryption e-health privacy Access control Electronic medical records Emergency care Secure cloud storage Break-glass access

来源：评论

学校读者我要写书评

暂无评论

A ciphertext-policy attribute-based encryption based on an Ordered Binary Decision Diagram

引用

IEEE ACCESS 2017年 5卷 1137-1145页

作者： Li, Long Gu, Tianlong Chang, Liang Xu, Zhoubo Liu, Yining Qian, Junyan Guilin Univ Elect Technol Sch Electromech Engn Guilin 541004 Peoples R China Guilin Univ Elect Technol Guangxi Expt Ctr Informat Sci Guilin 541004 Peoples R China Guilin Univ Elect Technol Guangxi Key Lab Trusted Software Guilin 541004 Peoples R China

ciphertext-policy attribute-based encryption (CP- ABE) is widely used in many cyber physical systems and the Internet of things for guaranteeing information security. In order to improve the performance and efficiency of CP-ABE, this paper makes a change to the access structure of describing access polices in CP-ABE, and presents a new CP-ABE system based on the ordered binary decision diagram (OBDD). The new system makes full use of both the powerful description ability and the high calculating efficiency of OBDD. First, in the access structure, the new system allows multiple occurrences of the same attribute in a strategy, supports both positive attribute and negative attribute in the description of access polices, and can describe free-form access polices by using Boolean operations. Second, in the key generation stage, the size of secret keys generated by the new system is constant and not affected by the number of attributes;furthermore, time complexity of the key generation algorithm is O(1). Thirdly, in the encryption stage, both the time complexity of the encryption algorithm and the size of generated ciphertext are determined by the number of valid paths contained in the OBDD instead of the number of attributes occurring in access polices. Finally, in the decryption stage, the new system supports fast decryption and the time complexity of the decryption algorithm is only O(1). As a result, compared with existing CP-ABE schemes, the new system has better performance and efficiency. It is proved that the new CP-ABE system can also resist collision attack and chosen-plaintext attack under the decisional bilinear Diffie-Hellman assumption.

关键词： ciphertext-policy attribute-based encryption ordered binary decision diagram access structure access policy decryption.

来源：评论

学校读者我要写书评

暂无评论

Verifiable Outsourced ciphertext-policy attribute-based encryption for Mobile Cloud Computing

引用

KSII TRANSACTIONS ON INTERNET AND INFORMATION SYSTEMS 2017年第6期11卷 3254-3272页

作者： Zhao, Zhiyuan Wang, Jianhua Zhengzhou Informat Sci & Technol Inst Zhengzhou 450001 Henan Peoples R China

With the development of wireless access technologies and the popularity of mobile intelligent terminals, cloud computing is expected to expand to mobile environments. attribute-based encryption, widely applied in cloud computing, incurs massive computational cost during the encryption and decryption phases. The computational cost grows with the complexity of the access policy. This disadvantage becomes more serious for mobile devices because they have limited resources. To address this problem, we present an efficient verifiable outsourced scheme based on the bilinear group of prime order. The scheme is called the verifiable outsourced computation ciphertext-policy attribute-based encryption scheme (VOC-CP-ABE), and it provides a way to outsource intensive computing tasks during encryption and decryption phases to CSP without revealing the private information and leaves only marginal computation to the user. At the same time, the outsourced computation can be verified by two hash functions. Then, the formal security proofs of its (selective) CPA security and verifiability are provided. Finally, we discuss the performance of the proposed scheme with comparisons to several related works.

关键词： Mobile cloud computing ciphertext-policy attribute-based encryption Access policy Verifiable Outsourced computation

来源：评论

学校读者我要写书评

暂无评论

An Efficient Pairing-Free ciphertext-policy attribute-based encryption Scheme for Internet of Things

引用

SENSORS 2024年第21期24卷 6843页

作者： Guo, Chong Gong, Bei Waqas, Muhammad Alasmary, Hisham Tu, Shanshan Chen, Sheng Beijing Univ Technol Coll Comp Sci Beijing 100124 Peoples R China Univ Greenwich Fac Engn & Sci Sch Comp & Math Sci London SE10 9LS England Edith Cowan Univ Sch Engn Joondalup WA 6027 Australia King Khalid Univ Dept Comp Sci Abha 62529 Saudi Arabia Univ Southampton Sch Elect & Comp Sci Southampton SO17 1BJ England

The Internet of Things (IoT) is a heterogeneous network composed of numerous dynamically connected devices. While it brings convenience, the IoT also faces serious challenges in data security. ciphertext-policy attribute-based encryption (CP-ABE) is a promising cryptography method that supports fine-grained access control, offering a solution to the IoT's security issues. However, existing CP-ABE schemes are inefficient and unsuitable for IoT devices with limited computing resources. To address this problem, this paper proposes an efficient pairing-free CP-ABE scheme for the IoT. The scheme is based on lightweight elliptic curve scalar multiplication and supports multi-authority and verifiable outsourced decryption. The proposed scheme satisfies indistinguishability against chosen-plaintext attacks (CPA) under the elliptic curve decisional Diffie-Hellman (ECDDH) problem. Performance analysis shows that our proposed scheme is more efficient and better suited to the IoT environment compared to existing schemes.

关键词： ciphertext-policy attribute-based encryption pairing-free access control Internet of Things

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：