introduction: measuring the extent and nature of outsourcing in public hospitals affiliated with tehran university of medical sciences (tums), tehran, iran was the aim of this study. methods: in this cross-sectional applied study, we reviewed the relevant literature and interviewed with 5 experts to introduce various indices of measuring the extent and nature of outsourcing. we recommended 6 si...

Data outsourcing is today receiving growing attention due to its benefits in terms of cost reduction and better services. According to such paradigm, the data owner is no more responsible for data management, rather it outsources its data to one or more service providers (referred to as publishers) that provide management services and query processing functionalities. Clearly, data outsourcing ...

Recently, studies on secure database outsourcing have been highlighted for the cloud computing environment. A few Top-k query processing algorithms proposed in encrypted database. However, previous can support either security or efficiency. Therefore, we propose a new algorithm using homomorphic cryptosystem, which both and For security, efficient protocols based arithmetic operations. To obtai...

We propose a scheme for outsourcing Private Information Retrieval (PIR) to untrusted servers while protecting the privacy of the database owner as well as that of the database clients. We observe that by layering PIR on top of an Oblivious RAM (ORAM) data layout, we provide the ability for the database owner to perform private writes, while database clients can perform private reads from the da...

Received Jul 28, 2015 Revised Nov 21, 2015 Accepted Dec 2, 2015 In accordance with the database management, DAS (database as service) model is one solution for outsourcing. However, we need some data protection mechanisms in order to maintain the database security Themost effective algorithm to secure databases from the security threat of third party attackers is to encrypt the sensitive data w...

The database services on cloud are appearing as an attractive way of outsourcing databases. When a database is deployed on a cloud database service, the data security and privacy becomes a big concern for users. A straightforward way to address this concern is to encrypt the database. However, after encryption, the database cannot be easily queried. In this paper, we propose a nonlinear order p...

Data outsourcing allows data owners to keep their data at untrusted clouds that do not ensure the privacy of data and/or computations. One useful framework for fault-tolerant data processing in a distributed fashion is MapReduce, which was developed for trusted private clouds. This paper presents algorithms for data outsourcing based on Shamir’s secret-sharing scheme and for executing privacy-p...

Database Outsourcing is a nascent data management paradigm in which the data owner stores the confidential data at the third party service provider’s site. The service provider is responsible for managing and administering the database and allows the data owner and clients to create, update, delete and access the database. There are chances of hampering the security of the data due to untrustwo...

The purpose of the present study is to investigate the effect of outsourcing the activities of government agencies on organizational structure. The current study is a descriptive-survey research implemented by the field method. The statistical population of the study consisted of managers of governmental organizations of Isfahan province. The questionnaires were distributed based on simple rand...