The 11th International Conference On Electronic Commerce (ICEC 2009)

August 12-15, 2009, TAIPEI, TAIWAN

Published in The ACM Digital Library

Multi Dimensional and Flexible Model for Databases

Morteza Sargolzaei Javan

Amirkabir University of Technology ,Tehran Polytechnic,  Iran, www.msjavan.tk

Mehdi Shajari

Amirkabir University of Technology ,Tehran Polytechnic,  Iran

Abstract:

This article proposes a flexible payment system that is useful for buying information items over Internet. A flash disk is used as a cheap smartcard with a secure password to pay for information goods and downloads. In the proposed system, The flash device owner is able to get download links from any geographical location and download the files he has already paid for, as long as the file has not been expired. A low implementation cost and fairly strong security enhancements make this model useful for micropayment and also other special purposes. In addition, with the proposed model, the merchants could manage subscription activities easily without any imposed costs by merchants or customers.

Categories and Subject Descriptors
K.4.4 [Electronic Commerce]: Payment schemes.

General Terms
Algorithms, Design, Security

Keywords:
Flash Payment, Flash Disk, Payment, Micro Payment

International Joint Conferences on Computer, Information, and Systems Sciences, and Engineering (CIS2E 08) December 5  - 13, 2008 Sponsored by the University of Bridgeport Technically co-sponsored by the IEEE Computer Society, Communications Society  and Education Society ( Connecticut Section )

Multi Dimensional and Flexible Model for Databases

Morteza Sargolzaei Javan

Amirkabir University of Technology ,Tehran Polytechnic,  Iran, www.msjavan.tk

Farahnaz Mohanna, Sepide Aghajani

Electronic and IT Engineering Departments, University of Sistan & Baluchestan, Zahedan, Iran.

Abstract:

This article proposes multi dimensional model for databases suitable for both transmissions of data over the networks and data storage in IT/IS systems. In this model there is no need to predict the complete structure of the databases. The structure of these databases can be changeable in any time as needed. In the proposed model, the structure of a record in a database can also be changeable without changing the structure of the other records. Users in this model are able to create any structure that the other databases such as Relational model are not able to do. Furthermore the structure of the tables in the databases can be expanded in all the dimensions. Therefore, the model can minimize the time of data processing and can optimize the capacity of the employed memory in such databases.

Keywords: Database, Relational Model, Flexible Tables, Multi-Dimensional Databases

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مرتضي سرگلزايي جوان1، سپيده آقاجاني2، دکتر فرحناز مهنا3

1 دانشگاه صنعتی امیر کبیر - دانشکده مهندسی کامپیوتر و فن آوری اطلاعات
2و3 دانشگاه سیستان و بلوچستان– دانشکده مهندسی نیکبخت

^چکیده:

در اين مقاله قصد داريم به ارائه روشي قابل انطباق با انواع سيستم هاي اطلاعاتي و نرم افزاري جهت پياده سازي امضاي ديجيتال بپردازيم. پياده سازي اين سيستم با استفاده از تکنولوژي WMI در ويندوز و در پلت فرم .Net  Framework  انجام شده است. سيستم به گونه اي پياده سازي شده که هر شخص مي تواند در صورت نياز امضاي خود را تغيير دهد، يا چندين امضا در سيستم براي خود تعريف کند. معماري سيستم بصورت دو لايه اي بوده و بعنوان يک واسط بين سخت افزار سيستم و برنامه کاربردي قرار ميگيرد. لايه اول تحت عنوان لايه يو.اس.بي. وظيفه پردازش اطلاعات سخت افزاري را برعهده دارد. لايه بعدي لايه امضاي ديجيتال است که وظيفه تطبيق امضا با پايگاه داده کاربران را بر عهده دارد. معماري لايه اي اين سيستم سبب مي شود که توسعه سيستم  آسان شده و به صورتهاي دلخواه توسعه دهندگان امکان‌پذير باشد.

کليد واژه : امضاي ديجيتال، فلش ديسک ، USB ، رمزنگاري