نتایج جستجو برای: multilevel security
تعداد نتایج: 204436 فیلتر نتایج به سال:
Now a day's use of an internet in public masses is growing. So large amount of data is stored in computers and transmitted over networks. Data security is main issue now days. Steganography is one of data hiding technique. In this paper we use a multilevel technique in audio steganography. By using multilevel technique we use three methods instead of one. Multilevel technique has advantage...
The rapid growth of the networking and information-processing industries has led to the development of distributed database management system prototypes and commercial distributed database management systems. In such a system, the database is stored in several computers which are interconnected by some communication media. The aim of a distributed database management system (DDBMS) is to proces...
Although there are several eeorts underway to build multilevel secure relational database management systems , there is no clear consensus regarding what a multilevel secure relational data model exactly is. In part this lack of consensus on fundamental issues re-ects the subtleties involved in extending the classical (single-level) relational model to a multilevel environment. Our aim in this ...
Traditional database security is made more complex by the addition of rules to the data model. The security policy must control access privileges and accessibility for rule descriptions, executing rules, and database transitions (events). In this paper we extend the multilevel secure relational model to capture the functionality required of an active database, i. e. a database with production r...
When implementing a multilevel security policy for Object-Oriented Databases (OODBs), several aspects have to be investigated. One of these aspect is the design of multilevel OODBs. In an OODB, data are organized in a complex structure built using different constructs (classes, objects, attributes, links ...). Therefore, a first problem is to determine what constructs of the object-oriented mod...
There are two main types of security in database systems: discretionary security and mandatory security. Discretionary security restricts access to data items at the discretion of the owner. Most commercial database management systems (DBMS) employ some form of discretionary security by controlling access privileges and modes of data users (Griffiths & Wade, 1976). Discretionary security is not...
Secure canonical upgrade policies are multilevel relabel policies that, under certain conditions, allow high-level subjects to update low-level security labels. This paper describes a scheme whereby these policies can be supported within the Message Filter Model for multilevel secure object-oriented database management systems.
In this paper we describe a preliminary design and implementation of a multilevel secure deductive database management system (MLSIDEDBMS). In particular, logic as a dara model for multilevel databases, reasoning across security levels, architectural issues for an MLSIDEDBMS, and a prototype implementation are discussed.
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