Eric Pardede

Computational Science and Its Applications – ICCSA 2010

Where you can find the computational science and its applications iccsa 2010 international conference fukuoka japan march 23 26 2010 proceedings part iii lecture notes in computer science easily? Is it in the book store? Online book store? are you sure? Keep in mind that you will find the book in this site. This book is very referred for you because it gives not only the experience but also lesson. The lessons are very valuable to serve for you, thats not about who are reading this computational science and its applications iccsa 2010 international conference fukuoka japan march 23 26 2010 proceedings part iii lecture notes in computer science book. It is about this book that will give wellness for all people from many societies.

MCDB: Using Multi-clouds to Ensure Security in Cloud Computing

Security is considered to be one of the most critical aspects in a cloud computing environment due to the sensitive and important information stored in the cloud for users. Users are wondering about attacks on the integrity and the availability of their data in the cloud from malicious insiders and outsiders, and from any collateral damage of cloud services. These issues are extremely significant but there is still much room for security research in cloud computing. This paper focuses more on the issues related to the data security and privacy aspects in cloud computing, such as data integrity, data intrusion, service availability. It proposes a Multi-clouds Database Model (MCDB) which is based on Multi-clouds service providers instead of using single cloud service provider such as in Amazon cloud service. In addition, it will discuss and present the architecture of the proposed MCDB model and describe its components and layers. The results and implementation for the new proposed model will be analyzed, in relation to addressing the security factors in cloud computing, such as data integrity, data intrusion, and service availability.

Using Multi Shares for Ensuring Privacy in Database-as-a-Service

Database-as-a-service (DAAS) is a new model for data management, where a service provider offers customers software management functionalities as well as the use of expensive hardware. This service enables data integration and access on a large scale in cloud computing infrastructures. Addressing data privacy in DAAS is considered a significant issue for any organizational database. Due to the fact that data will be shared with a third party, an un-trusted server is dangerous and unsafe for the user. This paper proposes the architecture of a new model appropriate for NetDB2 architecture, known as NetDB2 Multi-Shares (NetDB2-MS). It is based on multi-service providers and a secret sharing algorithm instead of encryption, which is used by the existing NetDB2 service. The evaluation is done through simulations. It shows a significant improvement in performance for data storage and retrieval for various query types.

A New approach using redundancy technique to improve security in cloud computing

Security is considered to be one of the most critical aspects in a cloud computing environment due to the sensitivity and importance of information stored in the cloud and also because the management of the data might not be fully trustworthy. The risk of malicious insiders in the cloud and the failing of cloud services have received a strong attention by companies. Security brings in concerns for data confidentiality, in addition to integrity and availability. Security has the characteristics of a complement to reliability. This work proposes a new model called Multi-clouds Databases (MCDB) which uses multi-clouds instead of single cloud service provider, such as in Amazon cloud service. The proposed model also incorporates the Shamirs secret sharing approach. In addition, it adopts a triple modular redundancy (TMR) technique with sequential method to improve the proposed cloud computing systemreliability and then enhance the security aspect.

Object-relational complex structures for XML storage

XML data can be stored in various database repositories, including Object-Relational Database (ORDB). Using an ORDB, we get the benefit of the relational maturity and the richness of Object-Oriented modeling, including various complex data types. These data types resemble the true nature of XML data and therefore, the conceptual semantic of XML data can be preserved. However, very often when the data is stored in an ORDB repository, they are treated as purely flat tables. Not only do we not fully utilize the facilities in current ORDB, but also we do not preserve the conceptual semantic of the XML data. In this paper, we propose novel methodologies to store XML data into new ORDB data structures, such as user-defined type, row type and collection type. Our methodology has preserved the conceptual relationship structure in the XML data, including aggregation, composition and association. For XML data retrieval, we also propose query classification based on the current SQL. Compared to the existing techniques, this work has several contributions. Firstly, it utilizes the newest features of ORDB for storing XML data. Secondly, it covers a full database design process, from the conceptual to the implementation phase. Finally, the proposed transformation methodologies maintain the conceptual semantics of the XML data by keeping the structure of the data in different ORDB complex structures.

Graph Data Management: Techniques and Applications

Graph Data Management: Techniques and Applications is a central reference source for different data management techniques for graph data structures and their application. This book discusses graphs for modeling complex structured and schemaless data from the Semantic Web, social networks, protein networks, chemical compounds, and multimedia databases and offers essential research for academics working in the interdisciplinary domains of databases, data mining, and multimedia technology.

New SQL standard for object-relational database applications

We examine the impact of the newest generation of structured query language (SQL), which is the standard language for relational model. The new standard of SQL4 adds powerful object-oriented data structures to object-relational database (ORDB), which is designed and implemented on relational model, to be used in diverse applications. We offer some opportunities of ORDB usage in many emerging database technologies such as statistical and scientific database, Web database, multimedia database, etc. We aim to show how standardizations impact on the model that can be useful for many real world applications.

Multi-Cloud Data Management using Shamir's Secret Sharing and Quantum Byzantine Agreement Schemes

Cloud computing is a phenomenal distributed computing paradigm that provides flexible, low-cost on-demand data management to businesses. However, this so-called outsourcing of computing resources causes business data security and privacy concerns. Although various methods have been proposed to deal with these concerns, none of these relates to multi-clouds. This paper presents a practical data management model in a public and private multi-cloud environment. The proposed model BFT-MCDB incorporates Shamirs Secret Sharing approach and Quantum Byzantine Agreement protocol to improve trustworthiness and security of business data storage, without compromising performance. The performance evaluation is carried out using a cloud computing simulator called CloudSim. The experimental results show significantly better performance in terms of data storage and data retrieval compared to other common cloud cryptographic based models. The performance evaluation based on CloudSim experiments demonstrates the feasibility of the proposed multi-cloud data management model.

Preserving conceptual constraints during XML updates

Despite the increasing demand for an effective XML document repository, many are still reluctant to store XML documents in their natural tree form. One main reason is the inadequacy of XML query languages to update the tree‐form XML documents. Even though some of the languages have supported minimum update facilities, they do not concern on preserving the documents constraints. The results are updated documents with very low database integrity. In this paper, we propose a methodology to accommodate XML Update without violating the conceptual constraints of the documents. The method takes form as a set of functions that perform checking mechanisms before update operations. In this paper we discuss the conceptual constraints embedded in three different relationship structures: association, aggregation and inheritance relationship. We highlight four constraints related with association relationship (nuber of participants, referential integrity, cardinality, and adhesion), five constraints related with aggreg...

A new model to ensure security in cloud computing services

In the commercial world, various computing needs are provided as a service. Service providers meet these computing needs in different ways, for example, by maintaining software or purchasing expensive hardware. Security is one of the most critical aspects in a cloud computing environment due to the sensitivity and importance of information stored in the cloud. The risk of malicious insiders in the cloud and the failure of cloud services have received a great deal of attention by companies. This paper focuses on issues related to data security and privacy in cloud computing and proposes a new model, called Multi-Cloud Databases (MCDB). The purpose of the proposed new model is to address security and privacy risks in the cloud computing environment. Three security issues will be examined in our proposed model: data integrity, data intrusion, and service availability.