عنوان مقاله
الگوریتم کنترل همروندی امن برای پایگاههای داده امن چند سطحی
فهرست مطالب
مقدمه
مسائل امنیتی
مرور ادبیات
کار پیشنهادی: الگوریتم کنترل همروندی امن بدون گرسنگی
نتیجه گیری
بخشی از مقاله
مسائل امنیتی
در واژگان فنی پایگاههای داده MLS، یک شی می تواند فایل داده، رکورد یا فیلد در رکورد باشد و فرد می تواند یک موجود فعال باشد که قادر به درخواست دسترسی خواندن و نوشتن برای اشیاء می باشد. در پایگاههای داده MLS، اشیاء وافراد طبقه بندی می شوند. سطوح امنیتی اشیاء، سطوح طبقه بندی (دسته بندی) و افراد، سطوح کلیرانس نامیده می شوند. ترکیبی از سطوح طبقه بندی و کلیرانس ، برچسب نامیده می شود.
کلمات کلیدی:
Secure Concurrency Control Algorithm for MultiLevel Secure Databases Sonakshi Shanwal1 , Suresh Kumar2 1,2Department of CSE, Faculty of Engineering and Technology, MRIU, Faridabad 1 sonakshi.shanwal@gmail.com, 2 suresh.fet@mriu.edu.in ABSTRACT In a Multi Level Database (MLS) data as well as user, both are classified in order to provide security to data. Data and users are classified at different levels in the database and the user with a particular security level is allowed to access the data at that level or below that level only. So the concurrency control requirements of MLS databases are different from the concurrency control requirements of traditional databases. In this paper we have analysed the problems that may occur when conventional methods of concurrency control are used in MLS databases. We have proposed secure and starvation-free concurrency control algorithm. KEYWORDS Concurrency Control, Databases, Multilevel Secure Databases. 1. INTRODUCTION Like traditional databases, Multi Level Database (MLS) databases are also used by multiple users at the same time. The MLS databases are shared by concurrent transactions with different classification levels. Certain security aspects are imposed to traditional databases to convert them into Multi Level Database. Some multilevel secure database models use access-control protocols based on the BellLaPadula model [7]. It has two properties: simple security property and star property. The first property is for readaccess and the second property is for providing writeaccess. With these new constraints the traditional concurrency control techniques are not suitable for MLS databases because some additional inconsistencies occur due to them. Since the objective of multilevel secure databases was to classify data as well as user to enhance the security, it may be violated if the traditional techniques of concurrency control are used [1, 9]. Two main issues that may arise due to the basic approaches of concurrency control are the inference problem and signalling channels. These are the major threats to design of multilevel secure databases and are discussed in detail in the following section of the paper. To overcome these issues, many researchers have proposed secure algorithms for concurrency control in multilevel databases [8]. In this paper a starvation-free secure concurrency control algorithm is proposed.
