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21st International Conference on Information and Communications Security (ICICS)

作者： Wang, Geng Liu, Zhen Gu, Dawu Shanghai Jiao Tong Univ Sch Elect Informat & Elect Engn Shanghai Peoples R China

ISBN: (纸本)9783030415792;9783030415785

attribute-based encryption (ABE) is a standard method for achieving access control using cryptography, and is related to many other powerful primitives such as functional encryption. While classical pairing based ABE schemes support only boolean formulas as access policy, the first ABE scheme for arbitrary polynomial size circuits is given in [GVW13], and its security is based on LWE assumption. However, the GVW13 scheme is a key policy ABE (KP-ABE), and whether their method can be used to construct a ciphertext policy ABE (CP-ABE) scheme is currently unknown. In this paper, we present the first direct construction (not from universal circuits) of CP-ABE scheme for circuits. Similar to the two-to-one recoding technique used in GVW13, we introduce three-to-one recoding, and use it to construct our scheme, which can be proved for selective security assuming that LWE problem is hard, for arbitrary polynomial size circuits. Compared with universal circuit based constructions, our scheme is simpler and has lesser decryption cost.

关键词： ciphertext policy attribute-based encryption ABE for circuits LWE Lattice-based cryptography

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Cloud-based Secure Healthcare Framework by using Enhanced ciphertext policy attribute-based encryption Scheme

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INTERNATIONAL JOURNAL OF ADVANCED COMPUTER SCIENCE AND APPLICATIONS 2021年第6期12卷 393-399页

作者： Satar, Siti Dhalila Mohd Mohamed, Mohamad Afendee Hussin, Masnida Hanapi, Zurina Mohd Univ Sultan Zainal Abidin Fac Informat & Comp Terengganu Malaysia Univ Putra Malaysia Fac Comp Sci & Informat Technol Seri Kembangan Selangor Malaysia

Cloud computing is an emerging technology that has been used to provide better healthcare services to the users because of its convenient and economical features. Noted that the healthcare services required fast and reliable data sharing at anytime from anywhere for better monitoring and decision making in medical requirements. However, the privacy and integrity of electronic healthcare record become a significant issue during data sharing and outsourcing in Cloud. The data privacy of clients/patients is important in healthcare services where exposure of the data to unauthorized parties is unexceptional. In order to address this security loophole, this paper presents a Cloud-based Secure Healthcare Framework (SecHS) to offer safe access to healthcare and medical data. Specifically, this paper enhance the ciphertext policy attribute-based encryption (CP-ABE) scheme by adding two more modules which aims to provide fine-grained access control and offer privacy and integrity of data. It facilitates encryption and hashing schemes. The proposed framework is compared with existing frameworks that used CP-ABE scheme. It shows the SecHS offers better features towards securing the healthcare services data. Optimistically, data security requirements such as privacy, integrity and fine-grained access control are required to effectively proposed for assuring data sharing in the Cloud environment.

关键词： Cloud computing privacy and integrity fine-grained access control ciphertext policy attribute-based encryption electronic health record

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ERSChain: Towards secure and flexible educational resource sharing using consortium blockchain and revocable ciphertext-policy attribute-based encryption

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CONCURRENCY AND COMPUTATION-PRACTICE & EXPERIENCE 2024年第5期36卷 e7941-e7941页

作者： Zhao, Gang He, Hui Di, Bingbing Wu, Tong Cent China Normal Univ Fac Artificial Intelligence Educ Wuhan Peoples R China Henan Univ Fac Educ Kaifeng Peoples R China

Sharing high-quality educational resources has become an effective way to promote educational equity. The traditional educational resource sharing platforms using centralized storage architecture have security issues. Recently, many studies use blockchain to achieve secure sharing of educational resources. However, the existing blockchain-based educational resource sharing schemes only use blockchain as a storage tool, and have issues such as low sharing efficiency, without considering copyright security, and lack of a trusted sharing environment, which prevents the large-scale sharing of educational resources. In response, we propose ERSChain, a novel blockchain-based educational resources sharing solution. First, we put forward a hybrid storage method that keeps the hash value of resource in the blockchain and stores the encrypted resource in the off-chain, which can alleviate the storage and computing pressure brought by massive educational resources while ensuring the integrity of resources. Second, we construct an efficient revocable ciphertext-policy attribute-based encryption algorithm to implement flexible access control and an outsourced decryption algorithm to achieve greater efficiency. Obtaining access to educational resources is possible when user's attributes meet the access policy and the user's identity does not exist in the revocation list. Third, we put forward a credit mechanism to adjust the user's credibility and a credit-based consensus mechanism to maintain the trusted sharing environment. Finally, security analysis and plentiful of experiments demonstrate that our proposed ERSChain achieves security assurance, has better applicability than similar works, and enables large-scale sharing of educational resources.

关键词： blockchain ciphertext policy attribute-based encryption educational resource sharing hybrid storage outsourced decryption

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Analysis of ciphertext policy Hidden attribute-based encryption and Its Improved Method 2nd

Analysis of Ciphertext Policy Hidden Attribute-Based Encrypt...

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2nd International Conference on Frontiers in Cyber Security (FCS)

作者： Hu, Gongcheng Zhang, Leyou Xidian Univ Sch Math & Stat Xian 710126 Peoples R China

ISBN: (纸本)9789811508189;9789811508172

With people paying more attention to personal privacy protection, how to achieve fine-grained access control of data while protecting users' privacy has become a hot research at present. A ciphertext policy attribute-based encryption (CP-ABE) with hiding policy is regarded as one of the most effective methods to solve above problem. Although many policy hidden CP-ABE schemes have been proposed, in this paper, we will show some of them fail to achieve the complete privacy-preserving. Hence two effective attacks are introduced at first, namely, the attack of attribute testing and the guessing attack of access policy. Then we show several known schemes can not resist these two attacks. Finally, an effective policy hidden CP-ABE scheme that can resist the above two attacks is proposed. And we also show it achieves full security in the standard model under static assumptions.

关键词： policy hidden Privacy protection ciphertext policy attribute-based encryption

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ciphertext policy attribute-based encryption supporting unbounded attribute space from R-LWE

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KSII TRANSACTIONS ON INTERNET AND INFORMATION SYSTEMS 2017年第4期11卷 2292-2309页

作者： Chen, Zehong Zhang, Peng Zhang, Fangguo Huang, Jiwu Shenzhen Univ Coll Informat Engn Shenzhen 518060 Peoples R China Shenzhen Univ ATR Key Lab Natl Def Technol Shenzhen 518060 Peoples R China Sun Yat Sen Univ Sch Data & Comp Sci Guangzhou 510006 Guangdong Peoples R China Guangdong Key Lab Informat Secur Guangzhou 510006 Guangdong Peoples R China

ciphertext policy attribute-based encryption (CP-ABE) is a useful cryptographic technology for guaranteeing data confidentiality but also fine-grained access control. Typically, CP-ABE can be divided into two classes: small universe with polynomial attribute space and large universe with unbounded attribute space. Since the learning with errors over rings (R-LWE) assumption has characteristics of simple algebraic structure and simple calculations, based on R-LWE, we propose a small universe CP-ABE scheme to improve the efficiency of the scheme proposed by Zhang et al. (AsiaCCS 2012). On this basis, to achieve unbounded attribute space and improve the expression of attribute, we propose a large universe CP-ABE scheme with the help of a full-rank differences function. In this scheme, all polynomials in the R-LWE can be used as values of an attribute, and these values do not need to be enumerated at the setup phase. Different trapdoors are used to generate secret keys in the key generation and the security proof. Both proposed schemes are selectively secure in the standard model under R-LWE. Comparison with other schemes demonstrates that our schemes are simpler and more efficient. R-LWE can obtain greater efficiency, and unbounded attribute space means more flexibility, so our research is suitable in practices.

关键词： ciphertext policy attribute-based encryption R-LWE unbounded small universe large universe

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FATE: flexible attribute-based traceable encrypted data sharing scheme using smart contracts in wireless medical sensor networks

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ANNALS OF TELECOMMUNICATIONS 2025年第3-4期80卷 323-339页

作者： Singh, Aparna Rathee, Geetanjali Netaji Subhas Univ Technol Dept CSE New Delhi 110078 India

Given the adaptability and effectiveness of the smart health sector, it has gained much momentum in the last few years, particularly during the COVID-19 pandemic. However, the security and privacy of data sent through a public communication channel are gravely threatened by adopting cloud services for data sharing. The security and privacy of the data are also in jeopardy, as the owners lose full ownership of the material once it is uploaded to the cloud. In recent years, ciphertext policy attribute-based encryption (CP-ABE) has shown great potential as a privacy-preserving encryption mechanism. In this paper, a decentralized method of large-scale data storage has been introduced using the interplanetary file system (IPFS), thereby eliminating the issue of centralized storage and frequent data unavailability. A reliable third-party hospital node in a secure environment is adopted in the proposed model to guarantee data integrity and to reduce the load on the resource-constrained devices of the user. Simulation using the Charm-Crypto framework and Pairing-based Cryptography library using the SS512 curve proves its performance and efficiency. The proposed scheme's encryption time is constant at 46.96 ms regardless of the size of the attribute set, the key generation time is reduced by 79.09%, and the storage overhead is reduced by 71.3% as compared to the existing schemes.

关键词： ciphertext policy attribute-based encryption Interplanetary file system Smart health Access control Data sharing

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Design of a Sharing System based on Privacy-Preserving Personal Data 27

Design of a Sharing System based on Privacy-Preserving Perso...

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27th IEEE/ACIS International Conference on Software Engineering, Artificial Intelligence, Networking and Parallel/Distributed Computing (SNPD)

作者： Cao, Jianxiang Song, Xing Commun Univ China Sch Comp & Cyber Sci Beijing 100024 Peoples R China

ISBN: (纸本)9798350391961;9798350391954

In recent years, machine learning has been widely used to process large-scale data and train complex models. However, there are certain security risks in the construction process of machine learning models. Data trainers may infringe on the privacy of data owners and use personal data to train machine learning models without authorization. To truly prevent unauthorized training of personal data, this paper proposes a privacy-preserving personal data sharing system, called PPDS. And this paper adopts the combination of CP-ABE with outsourced decryption and secure multi-party computation to ensure the secure authorization and training of personal privacy data. In PPDS, data users can only obtain the trained models instead of the authorized data, effectively preventing the privacy leakage of personal data. Moreover, the experimental results show that PPDS is a safe and effective scheme to achieve personal data sharing.

关键词： data sharing secure multi-party computation ciphertext policy attribute-based encryption

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Secure and Efficient Rule Sharing for Collaborative Intrusion Detection: Leveraging CP-ABE and Blockchain Technology 6

Secure and Efficient Rule Sharing for Collaborative Intrusio...

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6th International Conference on Computer Communication and the Internet (ICCCI)

作者： Chen, Hong Ji Cheng, Bo-Chao Natl Chung Cheng Univ Dept Commun Engn Chiayi Taiwan Natl Chung Cheng Univ Dept Eletr Engn Chiayi Taiwan

ISBN: (纸本)9798350351774;9798350351767

An intrusion detection system (IDS) is a software program that identifies malicious activity or policy violations in order to improve cybersecurity. A single and solitary IDS suffers from a single point of failure and lacks complete network information about potential threats in order to provide accurate detection and offer a more comprehensive picture of the whole network. The concept that several intrusion detection systems (IDSs) may cooperate and exchange data to improve overall detection accuracy and efficiency is known in technology as Collaborative Intrusion Detection Networks (CIDN). Secure information sharing in CIDN is critical since sharing IDS parties must trust one another and guarantee that no information is exposed to other parties. This article proposes the Blockchain-based Rule Sharing Mechanism (BRSM), a trustworthy and efficient information dissemination mechanism that integrates Blockchain technology with ciphertext policy attribute-based encryption (CP-ABE). When exchanging data across IDS nodes, the publish IDS node employs CP-ABE to encrypt shared data (such as detection rules and alerts) before putting it on the Blockchain via smart contracts. According to the experiment results, BRSM performs better than other cutting-edge techniques now in use to maintain utility and privacy in CIDN rule sharing.

关键词： Network Security Collaborative Intrusion Detection Networks Blockchain ciphertext policy attribute-based encryption

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An enhanced traceable access control scheme based on multi-authority CP-ABE for cloud-assisted e-health system

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COMPUTER NETWORKS 2024年 254卷

作者： Liu, Xiao Wei, Zhenyang Li, Gaoxiang Chen, Jining Guangxi Univ Coll Comp & Elect Informat Nanning 530000 Peoples R China Guangxi Zhuang Autonomous Reg Informat Ctr Guangxi Key Lab Digital Infrastruct Nanning 530200 Peoples R China

Due to the inherent openness of the Internet of Things (IoT), e-health systems that utilize this technology on a broad scale are susceptible to network attacks. The propose black and white box traceable multi-authority ciphertext policy attribute-based encryption scheme (BWMABE) that combines black and white box accountability with ciphertext policy attribute-based encryption (CP-ABE) to improve data security in e-health systems. The proposed BWMABE scheme enhances security by enabling traceable permissions leakage and employs distributed attribute and key management across multiple authorities. By outsourcing the decryption process to cloud service providers, the proposed BWMABE significantly reduces the computational burden on end-users, making it suitable for lightweight IoT devices with limited computing power. Compared to previous traceable CP-ABE methods, the proposed BWMABE requires less computational effort while supporting both black box and white box traceability. By means of thorough security analysis and performance assessment, the proposed BWMABE has been validated to provide robust security and high efficiency, demonstrating its effectiveness in protecting e-health systems.

关键词： Black box traceable White box traceable ciphertext policy attribute-based encryption Cloud service provider E -health system

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A Cross-Domain Data Security Sharing Approach for Edge Computing based on CP-ABE 23

A Cross-Domain Data Security Sharing Approach for Edge Compu...

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23rd Asia-Pacific Network Operations and Management Symposium (APNOMS)

作者： Li, Jiacong Lv, Hang Lei, Bo China Telecom Corp Ltd Res Inst Beijing Peoples R China

ISBN: (数字)9784885523397

ISBN: (纸本)9784885523397

Cloud computing is a unified management and scheduling model of computing resources. To satisfy multiple resource requirements for various application, edge computing has been proposed. One challenge of edge computing is cross-domain data security sharing problem. ciphertext policy attribute-based encryption (CP-ABE) is an effective way to ensure data security sharing. However, many existing schemes focus on could computing, and do not consider the features of edge computing. In order to address this issue, we propose a cross-domain data security sharing approach for edge computing based on CP-ABE. Besides data user attributes, we also consider access control from edge nodes to user data. Our scheme first calculates public-secret key peer of each edge node based on its attributes, and then uses it to encrypt secret key of data ciphertext to ensure data security. In addition, our scheme can add non-user access control attributes such as time, location, frequency according to the different demands. In this paper we take time as example. Finally, the simulation experiments and analysis exhibit the feasibility and effectiveness of our approach.

关键词： edge computing data security sharing cross-domain ciphertext policy attribute-based encryption

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