Searching an Encrypted Cloud Meets Blockchain: A Decentralized, Reliable and Fair Realization

Hu, Shengshan; Cai, Chengjun; Wang, Qian; Wang, Cong; Luo, Xiangyang; Ren, Kui

doi:10.1109/infocom.2018.8485890

Cited by 207 publications

(132 citation statements)

References 8 publications

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“…Zero knowledge proof can be classified into two groups: interactive and non-interactive. In the field of blockchain, the most widely used zero knowledge proof is non-interactive zero knowledge proof (zk-SNARKs) [25]. Non-interactive means that the proof contains only a single message sent to the verifier from the prover, namely, there is no two-way communication between the prover and the verifier.…”

Section: B Zero Knowledge Proofmentioning

confidence: 99%

A Survey on Privacy Protection of Blockchain: The Technology and Application

2020

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As a kind of point-to-point distributed public ledger technology, blockchain has been widely concerned in recent years. The privacy protection of blockchain technology has always been the core issue of people's attention. In this paper, some existing solutions to the current problems of user identity and transaction privacy protection are surveyed, including coin mixing mechanism, zero knowledge proof, ring signature and other technologies. Secondly, five typical applications of privacy protection technology based on blockchain are proposed and analyzed, which are mainly divided into technology applications based on coin mixing protocol, encryption protocol, secure channel protocol and so on. Finally, in view of the shortages of the existing blockchain privacy protection technology, we explore future research challenges that need to be studied in order to preserve privacy in blockchain system, and looks forward to the future development direction.

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Section: B Zero Knowledge Proofmentioning

confidence: 99%

A Survey on Privacy Protection of Blockchain: The Technology and Application

2020

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“…To allow for the correctness and completeness verification of search results, the verifiable SE was introduced by Kurosawa and Ohtaki [11] against the unreliable server [12], which may return incorrect and incomplete search results to the data user. By using the emerging blockchain technique, decentralized SE schemes are designed in [13,14], which can ensure that the data user can always receive the correct and complete search results. Cloud computing promotes the development of data outsourcing services, and the SE schemes over encrypted outsourced cloud data are adequately researched in [15][16][17][18][19][20][21].…”

Section: Searchable Encryptionmentioning

confidence: 99%

A Key-Policy Searchable Attribute-Based Encryption Scheme for Efficient Keyword Search and Fine-Grained Access Control over Encrypted Data

et al. 2019

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Attribute based encryption is a promising technique that achieves flexible and fine-grained data access control over encrypted data, which is very suitable for a secure data sharing environment such as the currently popular cloud computing. However, traditional attribute based encryption fails to provide an efficient keyword based search on encrypted data, which somewhat weakens the power of this encryption technique, as search is usually the most important approach to quickly obtain data of interest from large-scale dataset. To address this problem, attribute based encryption with keyword search (ABKS) is designed to achieve fine-grained data access control and keyword based search, simultaneously, by an ingenious combination of attribute based encryption and searchable encryption. Recently, several ABKS schemes have been constructed in secure cloud storage system for data access control and keyword search. Nonetheless, each of these schemes has some defects such as impractical computation overhead and insufficient access policy expression. To overcome these limitations, in this paper, we design a Key-Policy Searchable Attribute-based Encryption Scheme (KPSABES) based on the full-blown key-policy attribute-based encryption proposed by Vipul Goyal et al. By novel design, our scheme not only inherits all advantages of that scheme but also achieves efficient and secure keyword search over encrypted data. We provide the detailed performance analyses and security proofs for our scheme. Extensive experiments demonstrated that our proposed scheme is superior in many aspects to the similar work.

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“…Once created and deployed to Ethereum, the contract's code cannot be modified forever even for its creator. 1 The contract can be triggered by a transaction from an external account or a call from other contracts, and is executed in transaction form. Once a smart contract transaction gets included in the blockchain, all the nodes in the network are expected to verify its validity by repeating the contract script.…”

Section: Smart Contract In Ethereummentioning

confidence: 99%

Augmenting Encrypted Search: A Decentralized Service Realization with Enforced Execution

Cai

Wang

et al. 2019

IEEE Trans. Dependable and Secure Comput.

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Searchable symmetric encryption (SSE) allows the data owner to outsource an encrypted database to a remote server in a private manner while maintaining the ability for selectively search. So far, most existing solutions focus on an honest-but-curious server, while security designs against a malicious server have not drawn enough attention. A few recent works have attempted to construct verifiable SSE that enables the data owner to verify the integrity of search results. Nevertheless, these verification mechanisms are highly dependent on specific SSE schemes, and fail to support complex queries. A general verification mechanism is desired that can be applied to all SSE schemes. In this work, instead of concentrating on a central server, we explore the potential of the smart contract, an emerging blockchain-based decentralized technology, and construct decentralized SSE schemes where the data owner can receive correct search results with assurance without worrying about potential wrongdoings of a malicious server. We study both public and private blockchain environments and propose two designs with a trade-off between security and efficiency. To better support practical applications, the multi-user setting of SSE is further investigated where the data owner allows authenticated users to search keywords in shared documents. We implement prototypes of our two designs and present experiments and evaluations to demonstrate the practicability of our decentralized SSE schemes.

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Searching an Encrypted Cloud Meets Blockchain: A Decentralized, Reliable and Fair Realization

Cited by 207 publications

References 8 publications

A Survey on Privacy Protection of Blockchain: The Technology and Application

A Survey on Privacy Protection of Blockchain: The Technology and Application

A Key-Policy Searchable Attribute-Based Encryption Scheme for Efficient Keyword Search and Fine-Grained Access Control over Encrypted Data

Augmenting Encrypted Search: A Decentralized Service Realization with Enforced Execution

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