Mobile computing and communication is a rapidly developing area. But mobility is associated with problems for security and privacy beyond those in open networks. A well known threat is tracking user movements. New risks are caused by the mobility of users, the portability of computers, and wireless links which include dynamics, resource dependencies and additional information to ensure the comm...

The database security is one of the important issues that should take a complete attention from researchers. Although applying the traditional security mechanisms, the database still violate from both of external and internal users. So, the researchers develop a Database Intrusion Detection System (DBIDS) to detect intrusion as soon as it occurs and override its malicious affects. The previous ...

java is an object-oriented program that has abundant open-source libraries for application development and 3d model rendering. spatial database is the database that can efficiently store and manage geographic information data though various spatial data management techniques. this paper explores the rationale of coupling java with spatial database to develop an effective platform for future bui...

In this thesis we introduce and solve three privacy problems in Secure Database Access protocols: Database Privacy, the Data Replication Problem, and the Secure user Identity problem. Database Privacy is concerned with keeping the databases information secure from the user. The Data Replication problem (DRP) deals with a new security concern for databases that emanates from the need to replicat...

In cloud computing environment the new data management model is in use now a days that enables data integration and access on a large scale cloud computing as a service termed as Database-as-a-service (DAAS). Through which service provider offers customer management functionalities as well as the expensive hardware. Data privacy is the major security determinant in DAAS because data will be sha...

1 I N T R O D U C T I O N Polyinstantiat ion has generated a great deal of controversy lately. Some have argued tha t polyinstantiat ion and integrity are fundamental ly incompatible, and have proposed alternatives to polyinstantiation. Others have argued about the correct definition of polyinstantiat ion and its operational semantics. Much has been writ ten about this topic, as can be seen fro...

In the wake of the September 11 terrorist attacks, the US government has initiated a wide array of measures to forestall replay of such attacks. One such measure is to encourage development and adoption of information technology to detect and apprehend suspects and security risks, and to manage emergencies should such an attack elude prevention. One element of information technology that is ind...

A multilevel database is intended to provide the security needed for database systems that contain data at a variety of classifications and serve a set of users having different clearances. This paper describes a formal security model for a such a system. The model is formulated in two layers, one corresponding to a reference monitor that enforces mandatory security, and the second an extension...

A multilevel database is intended to provide the security needed for database systems that contain data at a variety of classifications and serve a set of users having different clearances. This paper describes a formal security model for a such a system. The model is formulated in two layers, one corresponding to a reference monitor that enforces mandatory security, and the second an extension...