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International Conference on Informatics and Creative Multimedia (ICICM)

作者： Ravan, Rama Roshan Idris, Norbik Bashah Mehrabani, Zahra Univ Teknol Malaysia Adv Informat Sch Kuala Lumpur Malaysia Asian Pacific Univ UCTI Univ Kuala Lumpur Malaysia

ISBN: (纸本)9780769551333

Using database encryption to protect data in some situations where access control is not solely enough is inevitable. database encryption provides an additional layer of protection to conventional access control techniques. It prevents unauthorized users, including intruders breaking into a network, from viewing the sensitive data. As a result data remains protected even in the event that database is successfully attacked or stolen. However, encryption and decryption of data result in database performance degradation. In the situation where all the information is stored in encrypted form, one cannot make the selection on the database content any more. data should be decrypted first, so an unwilling tradeoff between the security and the performance is normally forced. The appropriate approaches to increase the performance are methods to deal directly with the encrypted data without firstly decrypting them. This paper introduces a secure scheme against frequency attack for pattern query on encrypted string data. Proposed scheme provides searching of arbitrary patterns in the fields' content and supposes that the database management server is untrusted and must be prevented from viewing the sensitive data.

关键词： database Security encrypted database query on encrypted data

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Authorized Equi-join for Multiple data Contributors in the PKC-Based Setting

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COMPUTER JOURNAL 2017年第12期60卷 1822-1838页

作者： Ma, Sha South China Agr Univ Coll Math & Informat 483 Wushan Rd Guangzhou 510642 Guangdong Peoples R China

The database-As-a-Service (DaaS) model provides seamless mechanisms for database management and service. As a countermeasure to security treats, encryption technologies have been widely adopted in database systems. Accordingly, privacy-preserving queries on encrypted databases has become an important research topic. In this paper, we present the first solution of authorized equi-join for multiple data contributors in the PKC-based setting. With the improved ciphertext security under checkability, our underlying cryptographic construction could be used independently as a standard procedure for many other relational operations, for instance, intersection, difference, and set union. As a feature, our scheme allows flexible authorization policies for the join operation by the controlled trapdoor transitivity, which has not yet been studied thoroughly in the literature. Our proposed scheme is efficient in encryption and execution and has a reasonable ciphertext size. It can be applied as a building block for data query in the DaaS model.

关键词： database-As-a-Service query on encrypted data equi-join data encryption authorization

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Symmetric searchable encryption with efficient range query using multi-layered linked chains

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JOURNAL OF SUPERCOMPUTING 2016年第11期72卷 4233-4246页

作者： Jho, Nam-Su Chang, Ku-Young Hong, Dowon Seo, Changho ETRI Cryptog Res Team Daejeon South Korea Kong Ju Univ Dept Math Sci Gong Ju Chungcheongnam South Korea

Searchable encryption is an encryption system which provides confidentiality of stored documents and usability of document search at the same time. Remote cloud storage is the most typical application for searchable encryption. By applying searchable encryption, inside attacks can be prevented fundamentally. Designing searchable encryption which supports various queries-for example, range query, conjunctive keyword query, etc.-is also important for convenience. In this paper, we focus on range query problem. Up to now, only a few results have been proposed, in which the main functions are constructed using public key cryptosystems. Therefore, the amount of computations for encryption and search is large. Furthermore, search time depends on the size of the entire database. We propose a new searchable encryption protocol which is based on a symmetric key encryption and linked chain structure instead of public key-based techniques. The main contribution of the protocol is reducing the computation cost for search remarkably. In reality, the amount of computations depends on the number of documents that are matched to a query instead of the size of the entire database.

关键词： Searchable encryption Cloud security data privacy query on encrypted data Range query

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Search on encrypted data: State of Arts

Search on Encrypted Data: State of Arts

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2016 IEEE Advanced Information Management,Communicates,Electronic and Automation Control Conference(IMCEC 2016)

作者： Li Bin Jiang Jianguo Beijing Jiaotong University Institute of Information Engineering Chinese Academy of Sciences

ISBN: (纸本)9781509001668

Search on encrypted data is a method that can effectively search over ciphertext of data stored in the untrusted database and return correct results to querier,such that the querier can correctly decrypt the results.A welldefined search scheme on encrypted data is required not only to ensure the correctness of query results,but also to protect the privacy of the query message,i.e.,the server who executes the search scheme cannot obtain any information of query messages from the returned *** addition,the efficiency is an important criterion to measure a search scheme on encrypted *** determines whether the scheme can be carried out effective in the real cloud computing ***,the technology of search on encrypted data is a key factor in effective implementation of a variety of applications in the mode of database as a service(Daa S) in cloud computing,and also is an important measure of enterprise cloud database product ***,the existing schemes cannot fully satisfy the requirements of cloud database applications,encryption algorithms,security and efficiency are need to further *** paper begins with the system model of Daa S and the background of its applications,then surveys existing search schemes on encrypted data and their development and gives the analysis and comparison of these schemes,and proposes the new development directions of the technology of search on encrypted data.

关键词： Cloud Computing query on encrypted data Searchable Encryption Deterministic Encryption Range query

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Novel data Storage and Retrieval in Cloud database by using Frequent Access Node Encryption

Novel Data Storage and Retrieval in Cloud Database by using ...

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proc 2014 inter conf contemporary comp informatics (ic3i)

作者： Syed, Sadia Teja, P. Srinivas VSU Comp Sci Nellore India

ISBN: (纸本)9781479966295

Cloud computing has the advantage that it offers companies unlimited data storage at attractive costs. However, it also introduces new challenges for protecting the confidentiality of the data, and the access to the data. Sensitive data like medical records, business or governmental data cannot be stored unencrypted on the cloud. Moreover, they can be of interest to many users and different policies could apply to each. Companies need new mechanisms to query the encrypted data without revealing anything to the cloud server, and to enforce access policies to the data. Current security schemes do not allow complex encrypted queries over encrypted data in a multi-user setting. Instead, they are limited to keyword searches. Moreover, current solutions assume that all users have the same access rights to the data. This paper shows the implementation of a scheme that allows making SQL-like queries on encrypted databases in a multi-user setting, while at the same time allowing the database owner to assign different access rights to users. we address these issues by combining cloud computing technologies and Attribute Based Encryption for Secure storage and efficient retrieval of data from the databases. Here the Attribute is the Frequent access Node in the database which can be encrypted for Secure Storage and Retrieval. Using database encryption to protect data in some situations where access control is not solely enough is inevitable. database encryption provides an additional layer of protection to conventional access control techniques. It prevents unauthorized users, including intruders breaking into a network, from viewing the sensitive data. As a result data keeps protected even in the incident that database is successfully attacked or stolen. However, data encryption and decryption process result in database performance degradation. In the situation where all the information is stored in encrypted form, one cannot make the selection on the database content any more

关键词： Cloud Computing Sharing Privacy DbaaS database Security encrypted database query on encrypted data Attribute based encryption ABE CP-ABE multi-level threshold constant size ciphertext

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Secure query Processing with data Interoperability in a Cloud database Environment 14

Secure Query Processing with Data Interoperability in a Clou...

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ACM SIGMOD International Conference on Management of data

作者： Wong, Wai Kit Kao, Ben Cheung, David Wai Lok Li, Rongbin Yiu, Siu Ming Hang Seng Management Coll Dept Comp Hong Kong Peoples R China Univ Hong Kong Dept Comp Sci Hong Kong Peoples R China

ISBN: (纸本)9781450323765

We address security issues in a cloud database system which employs the DBaaS model. In such a model, a data owner (DO) exports its data to a cloud database service provider (SP). To provide data security, sensitive data is encrypted by the DO before it is uploaded to the SP. Existing encryption schemes, however, are only partially homomorphic in the sense that each of them was designed to allow one specific type of computation to be done on encrypted data. These existing schemes cannot be integrated to answer real practical queries that involve operations of different kinds. We propose and analyze a secure query processing system (SDB) on relational tables and a set of elementary operators on encrypted data that allow data interoperability, which allows a wide range of SQL queries to be processed by the SP on encrypted information. We prove that our encryption scheme is secure against two types of threats and that it is practically efficient.

关键词： query on encrypted data secure database

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A Survey on querying encrypted data for database as a Service

A Survey on Querying Encrypted Data for Database as a Servic...

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5th International Conference on Cyber-Enabled Distributed Computing and Knowledge Discovery (CyberC)

作者： Ravan, Rama Roshan Idris, Norbik Bashah Mehrabani, Zahra Univ Teknol Malaysia Adv Informat Sch Kuala Lumpur Malaysia UCTI Univ Asian Pacific Univ Kuala Lumpur Malaysia

ISBN: (纸本)9780769551067

using database encryption to protect data in some situations where access control is not solely enough is inevitable. database encryption provides an additional layer of protection to conventional access control techniques. It prevents unauthorized users, including intruders breaking into a network, from viewing the sensitive data. As a result data keeps protected even in the incident that database is successfully attacked or stolen. However, data encryption and decryption process result in database performance degradation. In the situation where all the information is stored in encrypted form, one cannot make the selection on the database content any more. data should be decrypted first, so an unwilling tradeoff between the security and the performance is normally forced. The appropriate approaches to increase the performance are methods to deal directly with the encrypted data without firstly decrypting them. This paper while introduce some methods for searching on encrypted data, provides a comparison study between current methods in terms of performance and security.

关键词： Privacy DbaaS database Security database Outsourcing encrypted database query on encrypted data

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