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A secure outsourced Turing- equivalent computation scheme against semi-honest workers using fully homomorphic encryption

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Journal of Southeast University(English Edition) 2016年第3期32卷 267-271页

作者：方昊胡爱群东南大学信息科学与工程学院南京210096

A scheme that can realize homomorphic Turing- equivalent privacy-preserving computations is proposed, where the encoding of the Turing machine is independent of its inputs and running time. Several extended private information retrieval protocols based on fully homomorphic encryption are designed, so that the reading and writing of the tape of the Turing machine, as well as the evaluation of the transition function of the Turing machine, can be performed by the permitted Boolean circuits of fully homomorphic encryption schemes. This scheme overwhelms the Turing-machine-to- circuit conversion approach, which also implements the Turing-equivalent computation. The encoding of a Turing- machine-to-circuit conversion approach is dependent on both the input data and the worst-case runtime. The proposed scheme efficiently provides the confidentiality of both program and data of the delegator in the delegator-worker model of outsourced computation against semi-honest workers.

关键词： Turing machine fully homomorphic encryption outsourced computation

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SEOT: Secure dynamic searchable encryption with outsourced ownership transfer

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Frontiers of Computer Science 2023年第5期17卷 165-177页

作者： Jianwei LI Xiaoming WANG Qingqing GAN Department of Information Science and Technology Jinan UniversityGuangzhou 510632China Department of Cyber Security Guangdong University of Foreign StudiesGuangzhou 510006China

When one enterprise acquires another,the electronic data of the acquired enterprise will be transferred to the acquiring *** particular,if the data system of acquired enterprise contains a searchable encryption mechanism,the corresponding searchability will also be *** this paper,we introduce the concept of Searchable Encryption with Ownership Transfer(SEOT),and propose a secure SEOT *** on the new structure of polling pool,our proposed searchable encryption scheme not only achieves efficient transfer of outsourced data,but also implements secure transfer of data ***,we optimize the storage cost for user to a desirable *** prove our scheme can achieve the secure characteristics,then carry out the performance evaluation and *** results demonstrate that our scheme is superior in efficiency and practicability.

关键词： cloud computing ownership transfer searchable encryption forward secure outsourced computation

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Blockchain-Based Light-Weighted Provable Data Possession for Low Performance Devices

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Computers, Materials & Continua 2022年第11期73卷 2205-2221页

作者： Yining Qi Zhen Yang Yubo Luo Yongfeng Huang Xing Li Tsinghua University Beijing100084China Beijing National Research Center for Information Science and Technology Beijing100084China Beijing University of Posts and Telecommunications Beijing100084China University of North Carolina at Chapel Hill North Carolina27599USA

Provable Data Possession(PDP)schemes have long been proposed to solve problem of how to check the integrity of data stored in cloud service without ***,with the emerging of network consisting of low performance devices such as Internet of Things,we find that there are still two obstacles for applying PDP *** first one is the heavy computation overhead in generating tags for data blocks,which is essential for setting up any PDP *** other one is how to resist collusion attacks from third party auditors with any possible entities participating the *** this paper,we propose a novel blockchain-based light-weighted PDP scheme for low performance devices,with an instance deployed on a cloud *** design a secure outsourced tag generating method for low performance devices,which enables a kind of“hash-sign-switch”two-phase tag *** this method,users with low performance devices can employ third party auditors to compute modular exponential operations that accounts for the largest portion of computation overhead in tag generation,without leaking their data *** in blockchain network ensure the correctness of such outsourcing and prevent collusion *** security analysis and performance evaluation prove that our scheme is both secure and efficient.

关键词： Provable data possession outsourced computation blockchain smart contract chameleon hash

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Efficient outsourced extraction of histogram features over encrypted images in cloud

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Science China(Information Sciences) 2021年第3期64卷 232-234页

作者： Yanli REN Xinpeng ZHANG Dawu GU Guorui FENG School of Communication and Information Engineering Shanghai University Department of Computer Science and Engineering Shanghai Jiao Tong University

Dear editor,JPEG steganalysis mainly includes feature extraction and classification [1, 2], and thus the quality of the extracted features has an important influence on the detection performance of classifiers. With the development of JPEG steganalysis, the dimension of extracted features is greatly increased for improving the detecting performance [3].

关键词： Cloud computing outsourced computation Histogram feature Image steganalysis Symmetric encryption

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