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cloud data auditing with designated verifier

Frontiers of Computer Science 2014年第3期8卷 503-512页

作者： Solomon Guadie WORKU Chunxiang XU Jining ZHAO School of Computer Science and Engineering University of Electronic Science and Technology of China Chengdu 611731 China

An auditing scheme is a good way to prove owner＇s data outsourced to the cloud are kept intact, and a scheme capable of giving public verifiability service is a good option that some researchers have managed to build for the last few years. However, in a public auditing scheme everybody does verification of data and a possibility of leaking some secrete information to the public verifiers is an issue that data owners are unhappy with this scenario. For example, the data owner does not want anybody else to know he has the data stored in the cloud server. Motivated by the issue of privacy associated with public auditing system, we proposed a designated verifier auditing （DVA） scheme based on Steinfeld et al.＇s universal designated verifier （DV） signature scheme. Our DVA scheme authorizes a third party auditor with private verification capability. It provides private verification because the scheme involves private key of the verifier. Moreover, we present the batch auditing scheme to improve auditing efficiency. Through rigorous security analysis we showed that our scheme is provably secure in the random oracle model assuming that the computational Diffie-Hellman （CDH） problem is hard over the group of bilinear maps.

关键词： cloud data storage designated verifier data privacy storage correctness cloud computing

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Implementation and Validation of the Optimized Deduplication Strategy in Federated cloud Environment

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Computers, Materials & Continua 2022年第4期71卷 2019-2035页

作者： Nipun Chhabra Manju Bala Vrajesh Sharma I.K.Gujral Punjab Technical University Jalandhar144603india

cloud computing technology is the culmination of technical advancements in computer networks,hardware and software capabilities that collectively gave rise to computing as a *** offers a plethora of utilities to its clients worldwide in a very cost-effective way and this feature is enticing users/companies to migrate their infrastructure to cloud *** by its gigantic capacity and easy access clients are uploading replicated data on cloud resulting in an unnecessary crunch of storage in *** data compression techniques came to rescue but none could serve the purpose for the capacity as large as a cloud,hence,researches were made to de-duplicate the data and harvest the space from exiting storage capacity which was going in vain due to duplicacy of *** providing better cloud services through scalable provisioning of resources,interoperability has brought many cloud Service Providers(CSPs)under one umbrella and termed it as cloud *** policies have been devised for private and public cloud deployment models for searching/eradicating replicated copies using hashing *** the exploration for duplicate copies is not restricted to any one type of CSP but to a set of public or private CSPs contributing to the *** was found that even in advanced deduplication techniques for federated clouds,due to the different nature of CSPs,a single file is stored at private as well as public group in the same cloud federation which can be handled if an optimized deduplication strategy be rendered for addressing this ***,this study has been aimed to further optimize a deduplication strategy for federated cloud environment and suggested a central management agent for the *** was perceived that work relevant to this is not existing,hence,in this paper,the concept of federation agent has been implemented and deduplication technique following file level has been used for the accomplishment of this approa

关键词： Federation agent deduplication in federated cloud central management agent for cloud federation interoperability in cloud computing bloom filters cloud computing cloud data storage

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cloud data Encryption and Authentication Based on Enhanced Merkle Hash Tree Method

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Computers, Materials & Continua 2022年第7期72卷 519-534页

作者： J.Stanly Jayaprakash Kishore Balasubramanian Rossilawati Sulaiman Mohammad Kamrul Hasan B.D.Parameshachari Celestine Iwendi Department of CSE Mahendra Institute of TechnologyNamakkal637503India Department of EEE Dr.Mahalingam College of Engineering and TechnologyPollachi642003India Center for Cyber Security Faculty of Information Science and TechnologyUniversiti Kebangsaan Malaysia(UKM)43600BangiMalaysia Department of Telecommunication Engineering GSSS Institute of Engineering and Technology for WomenMysuruIndia School of Creative Technologies University of BoltonDeane RoadBoltonUnited Kingdom

Many organizations apply cloud computing to store and effectively process data for various *** user uploads the data in the cloud has less security due to the unreliable verification process of data *** this research,an enhanced Merkle hash tree method of effective authentication model is proposed in the multi-owner cloud to increase the security of the cloud *** Hash tree applies the leaf nodes with a hash tag and the non-leaf node contains the table of hash information of child to encrypt the large *** Hash tree provides the efficient mapping of data and easily identifies the changesmade in the data due to proper *** developed model supports privacy-preserving public auditing to provide a secure cloud storage *** data owners upload the data in the cloud and edit the data using the private *** enhanced Merkle hash tree method stores the data in the cloud server and splits it into *** data files requested by the data owner are audit by a third-party auditor and the multiowner authentication method is applied during the modification process to authenticate the *** result shows that the proposed method reduces the encryption and decryption time for cloud data storage by 2–167 ms when compared to the existing Advanced Encryption Standard and Blowfish.

关键词： cloud computing cloud data storage cloud service provider merkle hash tree multi-owner authentication third-party auditor

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