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identity-based proxy re-encryption version 2: Making mobile access easy in cloud

FUTUre GENERATION COMPUTER SYSTEMS-THE INTERNATIONAL JOURNAL OF ESCIENCE 2016年 62卷 128-139页

作者： Zhou, Yunya Deng, Hua Wu, Qianhong Qin, Bo Liu, Jianwei Ding, Yong Beihang Univ Sch Elect & Informat Engn Beijing 100191 Peoples R China Wuhan Univ Sch Comp Wuhan 430072 Peoples R China Renmin Univ China Sch Informat Key Lab Data Engn & Knowledge Engn Minist Educ Beijing Peoples R China Xidian Univ State Key Lab Integrated Serv Networks Xian Peoples R China Shandong Univ Minist Educ Key Lab Cryptol Technol & Informat Secur Jinan 250100 Peoples R China Chinese Acad Sci Inst Informat Engn State Key Lab Informat Secur Beijing 100093 Peoples R China Aerosp Hengxing Sci & Technol Co LTD Beijing Peoples R China Guangxi Key Lab Cryptog & Informat Secur Guilin U Sch Math & Comp Sci Guilin Guangxi Peoples R China

proxy re-encryption (Pre) enables an authorized proxy to convert a ciphertext under Alice's public key into a ciphertext under Bob's public key without exposing the encrypted message. In existing Pre systems, the original ciphertexts and the re-encrypted ones are both required to be in the same cryptosystem, which limits their applications in cloud computing systems. In this paper, we propose a new proxy re-encryption pattern, referred to as an identity-based proxy re-encryption version 2 (IBPre2). It allows an authorized proxy to convert a ciphertext of an identity-based broadcast encryption (IBBE) scheme into a ciphertext of an identity-based encryption (IBE) scheme. With IBPre2, one can take advantage of IBBE to securely share data with a set of recipients, and then incorporate an additional one into the authorized set through the re-encryption mechanism, without decrypting the IBBE ciphertext nor leaking any sensitive information. We formalize the security requirements in IBPre2 and propose a provably CCA-secure scheme. The unique feature of ciphertext transformation from a complicated cryptosystem to a simple one makes our IBPre2 a versatile cryptographic tool to secure outsourced data in cloud computing. (C) 2015 Elsevier B.V. All rights reserved.

关键词： Data security identity-based proxy re-encryption IBE IBBE

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IB-VPre: adaptively secure identity-based proxy re-encryption scheme from LWE with re-encryption verifiability

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JOURNAL OF AMBIENT INTELLIGENCE AND HUMANIZED COMPUTING 2022年第1期13卷 469-482页

作者： Wu Li-qiang Yang Xiao-yuan Zhang Min-qing Wang Xu-an Natl Univ Def Technol Coll Comp Changsha 410073 Peoples R China Engn Univ Chinese Armed Police Force Coll Cryptog Engn Xian 710086 Shaanxi Peoples R China Xi Dian Univ Minist Educ Key Lab Comp Network & Informat Secur Xian 710071 Shaanxi Peoples R China

identity-based proxy re-encryption (IB-Pre) can convert the ciphertext encrypted under Alice's identity to Bob's ciphertext of the same message by a semi-trusted proxy with the proper transformation key. The main purpose of our work is to enhance the security of IB-Pre. For outside attacks, all existing IB-Pre constructions from lattices have only achieved a limited or weak security model called IND-sID-CPA security. Therefore, by embedding re-encryption key generation and re-encryption algorithms appropriately in Agrawal et al.'s identity-based encryption scheme from lattices, we construct an IND-ID-CPA secure IB-Pre scheme over decisional learning with errors (LWE) under the standard model. For inside attacks, we propose a new primitive IB-VPre by extending the basic IB-Pre scheme with a new functionality called re-encryption verifiability, meaning that a re-encrypted ciphertext receiver or a third party can verify whether the received ciphertext is correctly transformed from an original ciphertext or not, and thus can detect illegal activities of the proxy. We realize re-encryption verifiability using the homomorphic signature technique as a black box, making the resulting scheme non-interactive and quantum-immune after instanced by a lattice-based homomorphic signature scheme.

关键词： identity-based proxy re-encryption Adaptive security LWE re-encryption verifiability

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On the relation between identity-based proxy re-encryption and Mediated identity-based encryption

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JOURNAL OF INFORMATION SCIENCE AND ENGINEERING 2011年第1期27卷 243-259页

作者： Wan, Zhong-Mei Weng, Jian Lai, Xue-Jia Liu, Sheng-Li Li, Ji-Guo Shanghai Jiao Tong Univ Dept Comp Sci & Engn Shanghai 200240 Peoples R China Hohai Univ Coll Sci Nanjing 210098 Peoples R China Hohai Univ Dept Comp Sci Nanjing 210098 Peoples R China Jinan Univ Dept Comp Sci Guangzhou 510630 Guangdong Peoples R China Singapore Management Univ Sch Informat Syst Singapore 178902 Singapore

identity-based proxy re-encryption (IBPre) is a useful primitive, in the sense that a semi-trust proxy can translate ciphertexts originally intended for one identity into ciphertexts intended for another identity. The proxy, however, cannot learn anything about the underlying plaintexts. Mediated identity-based encryption (MIBE), introduced by Ding et al., is particularly useful for the immediate revocation of identities. In this paper, we study the relation between IBPre and MIBE. We show that, under the chosen-plaintext attack (CPA), IBPre and MIBE are equivalent: we give a generic construction of CPA-secure IBPre scheme from any CPA-secure MIBE scheme;and a generic construction for the opposite direction is also given. However, under the chosen-ciphertext attack (CCA), we show that IBPre and MIBE are not equivalent: for an IBPre scheme generically constructed from CCA-secure MIBE, we can give a concrete attack against this resulting IBPre scheme;similarly, we also give a concrete attack against the MIBE scheme generically constructed from CCA-secure IBPre. We believe that our results are theoretically interesting, since for the first time they clarify the relation between IBPre and MIBE.

关键词： identity-based proxy re-encryption mediated identity-based encryption chosen-plaintext attack chosen-ciphertext attack generic construction

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Towards Multi-Hop Homomorphic identity-based proxy re-encryption via Branching Program

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IEEE ACCESS 2017年 5卷 16214-16228页

作者： Li, Zengpeng Ma, Chunguang Wang, Ding Harbin Engn Univ Coll Comp Sci & Technol Harbin 150001 Peoples R China Chinese Acad Sci Inst Informat Engn State Key Lab Informat Secur Beijing 100093 Peoples R China Peking Univ Sch Elect Engn & Comp Sci Beijing 100871 Peoples R China

identity-based proxy re-encryption (IBPre) is a powerful cryptographic tool for various applications, such as access control system, secure data sharing, and secure e-mail forwarding. Most of the existing efficient IBPre schemes are based on the Diffie-Hellman assumption, and they only focus on the single-hop construction. based on the work of Chandran et al.'s lattice-based proxy re-encryption (Pre) scheme (PKC'14) and Yamada's lattice-based identity-based encryption (IBE) scheme (EUROCRYPT'16), in this paper, we first show the possibility of assembling lattice-based IBE into lattice-based Pre. Then, we present the construction of a new efficient single-hop homomorphic IBPre from learning with errors (LWEs) via key homomorphic computation. Furthermore, using branching program (BP), we obtain an efficient multi-hop IBPre scheme. To the best of our knowledge, our scheme is the first multi-hop homomorphic IBPre scheme via BP. Our scheme supports homomorphic evaluation and is proved secure under the decisional LWE assumption.

关键词： Multi-hop identity-based proxy re-encryption key switching mechanism homomorphic evaluation

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Key-Private identity-based proxy re-encryption

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Computers, Materials & Continua 2020年第5期63卷 633-647页

作者： Chunpeng Ge Jinyue Xia Liming Fang College of Computer Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing210000China IBM Research Triangle ParkNorth Carolina27709USA

An identity-based proxy re-encryption scheme(IB-Pre)allows a semi-trusted proxy to convert an encryption under one identity to another without revealing the underlying *** to the fact that the proxy was semi-trusted,it should place as little trust as necessary to allow it to perform the *** some applications such as distributed file system,it demands the adversary cannot identify the sender and recipient’s ***,none of the exiting IB-Pre schemes satisfy this *** this work,we first define the security model of key-private ***,we propose the first key-private IB-Pre *** scheme is chosen plaintext secure(CPA)and collusion resistant in the standard model.

关键词： proxy re-encryption identity-based proxy re-encryption key-private collusion resistant

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Backdoor-resistant identity-based proxy re-encryption for cloud-assisted wireless body area networks

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INFORMATION SCIENCES 2022年 604卷 80-96页

作者： Zhou, Yuyang Zhao, Liang Jin, Yuqiao Li, Fagen Univ Elect Sci & Technol China Sch Comp Sci & Engn Chengdu 611731 Peoples R China Sichuan Univ Sch Cyber Sci & Engn Chengdu 610065 Peoples R China Second Res Inst CAAC Chengdu 610041 Peoples R China

The wireless body area network (WBAN) provides users with real-time medical services. Meanwhile, the cloud technology provides greater storage space and computing power for medical data. Both of them have contribute to the development of telemedicine. In a cloud-assisted WBAN, the open network environment and the semi-trust cloud service providers expose the user's private medical data to backdoor adversaries who can make exfiltration attacks, such as the algorithm substitution attack (ASA) through the process of data sharing. Therefore, it is necessary to find a secure and efficient medical data sharing scheme for the huge amount of medical data. In this paper, we first design an identity based proxy re-encryption scheme with cryptographic reverse firewall (IBPre-CRF), then show the application in a multiple-access telemedicine data sharing scenario. Security analysis shows that the IBPre-CRF scheme provides chosen plaintext attack security and resists exfiltration attacks. Performance analysis shows that the IBPre-CRF scheme has a significant communication and computational cost advantage while being resistant to exfiltration attacks in clouds. Therefore, our IBPre-CRF scheme is suitable for telemedicine data sharing in a cloud-assisted WBAN. (c) 2022 Elsevier Inc. All rights reserved.

关键词： identity-based proxy re-encryption Wireless body area networks Cryptographic reverse firewall Exfiltration-resistant

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A Chosen-Ciphertext Secure Fuzzy identity-based proxy re-encryption Scheme

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INTERNATIONAL JOURNAL OF SECURITY AND ITS APPLICATIONS 2016年第5期10卷 347-360页

作者： Ge, Chunpeng Wang, Jiandong Fang, Liming Nanjing Univ Aeronaut & Astronaut Coll Comp Sci & Technol Nanjing 210000 Jiangsu Peoples R China

Green and Ateniese introduced the notion of identity-based proxy re-encryption (IB-Pre), whereby the proxy can covert a ciphertext encrypted under the delegator's identity to an encryption under the delegatee's identity of the same message. In some situations, biometric, such as dactylogram, was used as identities. However, these biometric identities will inherently have some noise when they are sampled each time. To make identity-based proxy re-encryption flexible on identities, we introduced a new primitive called fuzzy identity-based proxy re-encryption (FIB-Pre), in which an identity is viewed as a set of descriptive attributes. In a fuzzy identity-based proxy re-encryption scheme, an identity can decrypt a ciphertext re-encrypted under another identity, if and only if and are close to each other as measured by the "set overlap" distance metric. In this work, we first formulate the security model of a FIB-Pre scheme. Finally, we present a construction of FIB-Pre and prove its CCA security under the decisional bilinear Diffie-Hellman (DBDH) assumption in the random model.

关键词： proxy re-encryption identity-based proxy re-encryption Fuzzy identity-based proxy re-encryption Chosen-ciphertext security

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Collusion-resistant identity-based proxy re-encryption Without Random Oracles

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INTERNATIONAL JOURNAL OF SECURITY AND ITS APPLICATIONS 2015年第9期9卷 337-344页

作者： Qiu, JunJie Jo, JungBok Lee, HoonJae Dongseo Univ Grad Sch Dept Ubiquitous IT Busan South Korea Weifang Univ Sci & Technol Weifang Peoples R China

In an identity-based proxy re-encryption scheme, a semi-trusted proxy can convert a ciphertext under Alice's public identity into a ciphertext for Bob. The proxy does not know the secret key of Alice or Bob, and also does not know the plaintext during the conversion. In identity-based proxy re-encryption, the collusion of the proxy and a delegatee may result in the decryption of ciphertext for delegator. In this paper, we present a new scheme which can avoid the collusion of proxy and delegatee. Our scheme improves the scheme of Chu and Tzeng while inheriting all useful properties such as unidirectionality and non-interactivity. In our scheme, we get the security by using added secret parameter and change the secret key and re-encryption key. Our sheme is secure against Chosen-Ciphertext Attack (CCA) and collusion attack in the standard model.

关键词： identity-based proxy re-encryption Collusion attack CCA Standard model

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An identity-based proxy re-encryption for data deduplication in cloud

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JOURNAL OF SYSTEMS ARCHITECTUre 2021年 121卷

作者： Kan, Ge Jin, Chunhua Zhu, Huihui Xu, Yongliang Liu, Nian Huaiyin Inst Technol Fac Comp & Software Engn Huaian 233003 Peoples R China

Cloud computing offers a huge resource pool by centralizing various resources with the rapid growth of digital data. Data storage is the most acceptable service in cloud computing. As one of the key technologies of cloud storage service, data deduplication technology allows cloud servers to save storage space by deleting redundant data. In order to protect data privacy, data holders generally encrypt their data first, and then upload the encrypted data to the cloud server, which clearly brings a new challenge for cloud data deduplication, as traditional deduplication technology cannot deduplicate encrypted data. Existing solutions have various security issues. They cannot flexibly support data access control, and also require data users to remain online. In this paper, we propose an identity-based proxy re-encryption data deduplication scheme using identity-based proxy re-encryption (IB-Pre) and identity-based proof of ownership (IB-PoW). The proposed scheme integrates cloud data deduplication with access control. By detailed security analysis and performance evaluation, we show that the proposed scheme is security, efficient and effective.

关键词： Cloud data deduplication identity-based proxy re-encryption Proof of ownership Cloud computing

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Chosen-ciphertext secure multi-hop identity-based conditional proxy re-encryption with constant-size ciphertexts

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THEOreTICAL COMPUTER SCIENCE 2014年第C期539卷 87-105页

作者： Liang, Kaitai Chu, Cheng-Kang Tan, Xiao Wong, Duncan S. Tang, Chunming Zhou, Jianying City Univ Hong Kong Dept Comp Sci Kowloon Hong Kong Peoples R China Inst Infocomm Res Infocomm Secur Dept Singapore 138632 Singapore Guangzhou Univ Sch Math & Informat Sci Guangzhou 510006 Guangdong Peoples R China

proxy re-encryption (Pre) allows one user to delegate the decryption rights of his/her ciphertexts to another user. Since the introduction of Multi-Hop identity-based Pre (MH-IBPre) by Green and Ateniese, the ciphertext size and the decryption complexity grow linearly in the number of re-encryption "hops". In this paper, for the first time, we propose an MH-IBPre that maintains the (constant) ciphertext size and computational complexity regardless of the number of re-encryption hops. Moreover, our scheme is bidirectional and also supports conditional re-encryption. The scheme is proven secure against selective identity and chosen-ciphertext attacks and collusion resistant in the standard model. As of independent interest, we also show that the conditional re-encryption can also be extended to a set of conditions. (C) 2014 Elsevier B.V. All rights reserved.

关键词： Conditional proxy re-encryption identity-based proxy re-encryption Bilinear map Chosen-ciphertext security Constant size ciphertext

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