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An enhanced media ciphertext-policy attribute-based encryption algorithm on media cloud

INTERNATIONAL JOURNAL OF DISTRIBUTED SENSOR NETWORKS 2020年第2期16卷 1-15页

作者： Li, Hao Deng, Lianbing Yang, Cheng Liu, Jianbo Da Hengqin Sci & Technol Dev Co Ltd Zhuhai Peoples R China Commun Univ China Beijing Peoples R China Commun Univ China Sch Informat & Commun Engn 1 DingFuZhuang East St Beijing 100024 Peoples R China

With the development of cloud computing, more and more video services are moving to the cloud. How to realize fine-grained access control of those data on cloud becomes an urgent problem. attribute-based encryption provides a solution. However, heavy computation is still a bottleneck restricting the wider application of attribute-based encryption in cloud computing. In addition, we find that expression of the access control structure on media cloud can be further improved. To solve these problems, we propose an enhanced media ciphertext-policy attribute-based encryption algorithm and introduce its two key components, the multiple access tree and the key chain. To increase the scalability of the proposed algorithm, we discussed the issues of multi-authorization, user revocation, and 1 -n multiple access tree. Security analysis shows that enhanced media ciphertext-policy attribute-based encryption can successfully resist chosen-plaintext attacks under the decisional bilinear Diffie-Hellman assumption. Performance analysis proves both theoretically and practically that the proposed algorithm incurs less computational cost than the traditional ciphertext-policy attribute-based encryption, multi-message ciphertext-policy attribute-based encryption, and scalable ciphertext-policy attribute-based encryption by optimizing the access control structure. Our proposed algorithm has strong practical significance in media cloud.

关键词： Access control ciphertext-policy attribute-based encryption video encryption fine-grained access structure key chain

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Anonymous Leakage-Resilient ciphertext-policy attribute-based encryption Supporting Direct Revocation 2nd

Anonymous Leakage-Resilient Ciphertext-Policy Attribute-Base...

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

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

ISBN: (纸本)9789811508189;9789811508172

Leakage-resilient ciphertext-policy attribute-based encryption (LR-CP-ABE) is an important tool to achieve fine-grained access control of data and resist side-channel attacks. Privacy protection and user revocation are two practical problems it faces. However, most of the existing schemes fail to achieve user revocation while protecting user's privacy at present. To address the above problems, we propose an anonymous LR-CP-ABE scheme with user revocation in this paper, which is proven to be adaptively secure in the standard model under four static assumptions over composite order group. Furthermore, we also show the proposed scheme achieves the receivers anonymity which protects the users' privacy. The performance analyses confirm the feasibility of the proposed scheme.

关键词： Anonymous ciphertext-policy attribute-based encryption Direct revocation Leakage-resilient

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Multi-Value-Independent ciphertext-policy attribute based encryption with Fast Keyword Search

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IEEE TRANSACTIONS ON SERVICES COMPUTING 2020年第6期13卷 1142-1151页

作者： Wang, Haijiang Dong, Xiaolei Cao, Zhenfu Shanghai Jiao Tong Univ Dept Comp Sci & Engn Shanghai 200240 Peoples R China East China Normal Univ Shanghai Key Lab Trustworthy Comp Shanghai 200062 Peoples R China

ABKS has drawn much attention from research and industry in recent years, an ABKS scheme is an encryption scheme that supports keyword search and access control. attribute-based encryption is a public key encryption that enables users to encrypt and decrypt message based on attributes. In a typical implementation, the size of the ciphertext is proportional to the number of attributes associated with it and the decryption time is proportional to the number of attributes used during decryption. Inherit from ABE technology, the computation cost and ciphertext size in most ABKS schemes grow with the complexity of the access policy. On the other hand, we found that the traditional ABKS schemes cannot resist our secret-key-recovery attack. To deal with the above problems, we present new ciphertext policy attribute based encryption with fast keyword search constructions. Our constructions preserve the fine-grained access control inherited from the ABE system while supporting hidden policy and fast keyword search. Our constructions feature multi-value-independent compared with the existing attribute based searchable encryption schemes. The performance analysis demonstrates the efficiency of our constructions. We offer rigorous security proof of our second scheme, which is IND-CKA and IND-CPA secure.

关键词： Keyword search encryption Servers Cloud computing Access control Public key ciphertext-policy attribute-based encryption searchable encryption commercial applications multi-value-Independent fast keyword search

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White-Box Traceable ciphertext-policy attribute-based encryption in Multi-Domain Environment

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IEEE ACCESS 2019年 7卷 128298-128312页

作者： Yan, Xixi He, Xu Yu, Jinxia Tang, Yongli Henan Polytech Univ Sch Comp Sci & Technol Jiaozuo 454003 Henan Peoples R China

In a ciphertext-policy attribute-based encryption (CP-ABE) system, the decryption keys are only related to attributes shared by multiple users and do not contain any identity information of their original holders. Hence, if a decryption key is leaked, there is no feasible method to trace the suspicious user. The user tracing problem has become an obstacle to the adoption of CP-ABE in practice. In order to address it, some traceable/accountable CP-ABE schemes have been established. However, considering the user tracing problem in multi-domain environment will face new challenges. Multi-domain environments usually have a two-layer structure, domains and intradomain users. When tracing a user, we should first trace the domain where the user is located, and then trace the user in the domain. Unfortunately, the existing traceable CP-ABE schemes only focus on one level of users tracing, and are not suitable for the two-layer structure of multi-domain environments. Therefore, a white-box traceable CP-ABE scheme in multi-domain environment is proposed in this paper. The proposed scheme obtains a so-called two-layer tracing. At the domain level, a short signature technique is used to prevent an attacker from forging the tracing parameter and realize the traceability for domains. Linkable ring signature technology is introduced at the user level to provide a tracing method for users by utilizing the linkability of the signature. The two signature structures are reasonably embedded in a user private key to support two-layer white-box tracing at both domains and intradomain users. The proposed scheme supports any monotone access structures and has full security against chosen plaintext attack in the standard model. Compared with related schemes, the asymptotic communication cost and the asymptotic computation cost of the proposed scheme are relatively low. These advantages make the proposed scheme more practical for solving the user tracing problem in multi-domain environment.

关键词： ciphertext-policy attribute-based encryption linkable ring signature multi-domain environment two-layer tracing white-box traceability

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Traceable and undeniable ciphertext-policy attribute-based encryption for cloud storage service

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INTERNATIONAL JOURNAL OF DISTRIBUTED SENSOR NETWORKS 2019年第4期15卷

作者： Yu, Gang Wang, Yongjuan Cao, Zhenfu Lin, Jian Wang, Xiangyu Informat Sci & Technol Inst State Key Lab Math Engn & Adv Comp Zhengzhou 450001 Henan Peoples R China Informat Sci & Technol Inst Henan Key Lab Network Cryptog Technol Zhengzhou 450001 Henan Peoples R China East China Normal Univ Shanghai Key Lab Trustworthy Comp Shanghai 200062 Peoples R China

ciphertext-policy attribute-based encryption is a promising mechanism with fine-grained access control for cloud storage system. However, there is a long-lasting problem of key abuse that a user may share its decryption key and a semi-honest authority may illegally issue decryption keys for unauthorized users for profits. To address this problem, we propose an accountable ciphertext-policy attribute-based encryption scheme. In our construction, there are two authorities to issue keys for users, but they cannot decrypt any ciphertexts without collusion. A shared key can be effectively traced, and if the traced identity claims that it is innocent, an auditor can publicly audit who will be responsible for the shared key. Compared with existing accountable ciphertext-policy attribute-based encryption schemes, the proposed scheme is more practical from the two aspects: (1) a user can normally request for a decryption key along with a short signature, and no additional interaction between users and authorities is needed;and (2) the complexity of tracing a masked secret key is reduced to |U| exponent computation, where |U| denotes the number of users in the system. At last, we give the security and experimental analysis.

关键词： ciphertext-policy attribute-based encryption key escrow traceability accountability cloud computing

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

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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

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Survey on Revocation in ciphertext-policy attribute-based encryption

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SENSORS 2019年第7期19卷 1695.-1695.页

作者： Al-Dahhan, Ruqayah R. Shi, Qi Lee, Gyu Myoung Kifayat, Kashif Univ Anbar Coll Comp & Informat Technol Al Anbar 31001 Iraq Liverpool John Moores Univ Dept Comp Sci Byrom St Liverpool L3 3AF Merseyside England Air Univ Dept Comp Sci & Engn Islamabad 44000 Pakistan

Recently, using advanced cryptographic techniques to process, store, and share data securely in an untrusted cloud environment has drawn widespread attention from academic researchers. In particular, ciphertext-policy attribute-based encryption (CP-ABE) is a promising, advanced type of encryption technique that resolves an open challenge to regulate fine-grained access control of sensitive data according to attributes, particularly for Internet of Things (IoT) applications. However, although this technique provides several critical functions such as data confidentiality and expressiveness, it faces some hurdles including revocation issues and lack of managing a wide range of attributes. These two issues have been highlighted by many existing studies due to their complexity which is hard to address without high computational cost affecting the resource-limited IoT devices. In this paper, unlike other survey papers, existing single and multiauthority CP-ABE schemes are reviewed with the main focus on their ability to address the revocation issues, the techniques used to manage the revocation, and comparisons among them according to a number of secure cloud storage criteria. Therefore, this is the first review paper analysing the major issues of CP-ABE in the IoT paradigm and explaining the existing approaches to addressing these issues.

关键词： cloud computing internet of things ciphertext-policy attribute-based encryption multiauthority schemes single authority schemes revocation

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Searchable ciphertext-policy attribute-based encryption with Multi-Keywords for Secure Cloud Storage 18

Searchable Ciphertext-Policy Attribute-Based Encryption with...

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International Conference on Computing and Pattern Recognition (ICCPR)

作者： Zhao, Zhiyuan Sun, Lei Li, Zuohui Liu, Ying Zhengzhou Informat Sci & Technol Inst 62 Sci AveHigh Tech Zone Zhengzhou Henan Peoples R China

ISBN: (纸本)9781450364713

Searchable encryption is one of the most important techniques for the sensitive data outsourced to cloud server, and has been widely used in cloud storage which brings huge convenience and saves bandwidth and computing resources. A novel searchable cryptographic scheme is proposed by which data owner can control the search and use of the outsourced encrypted data according to its access control policy. The scheme is called searchable ciphertext-policy attribute-based encryption with multikeywords (CPABMKS). In the scheme, CP-ABE and keywords are combined together through the way that the keywords are regarded as the file attributes. To overcome the previous problems in cloud storage, access structures are hidden so that receivers cannot extract sensitive information from the ciphertext. At the same time, this scheme supports the multikeywords search, and the data owner can outsource the encryption operations to the private cloud that can reduce the data owner' calculation. The security of this scheme is proved based on the DBDH assumption. Finally, scheme evaluation shows that the CPABMKS scheme is practical

关键词： Cloud computing ciphertext-policy attribute-based encryption Keyword search Multi-keywords

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A ciphertext-policy attribute-based encryption based on Multi-valued Decision Diagram 10th

A Ciphertext-Policy Attribute-Based Encryption Based on Mult...

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10th IFIP TC 12 International Conference on Intelligent Information Processing (IIP)

作者： Zhang, Shaowei Li, Long Chang, Liang Gu, Tianlong Liu, Huadong Guilin Univ Elect Technol Guangxi Key Lab Trusted Software Guilin 541004 Peoples R China

ISBN: (纸本)9783030008284;9783030008277

ciphertext-policy attribute-based encryption (CP-ABE) is a kind of asymmetric encryption which is widely used in cyber-physical system and Internet of Things. In CP-ABE, access structure is an important component affecting the efficiency and performance greatly in several stages, such as encryption stage, key generation stage, decryption stage. However, the existing CP-ABE schemes have low efficiency because of the application of traditional access structures. In order to alleviate the aforementioned problems, this paper proposes a brand-new access structure based on multi-valued decision diagram (MDD). According to this access structure, we design a new CP-ABE scheme which performs better than many current schemes. First, our scheme supports multi-valued attributes directly. Second, the size of secret key is constant because it bears no relationship to the number of attributes. Third, the time complexity of decryption stage is O(1).

关键词： ciphertext-policy attribute-based encryption Multi-valued decision diagram Access structure

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

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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.

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