Database security is usually implemented in terms of access control. Mandatory security requires classi cation levels for objects and clearance levels for subjects. In Object Oriented Databases, all operations are invoked via message passing. Such operations belong to two categories: those that create new objects and those that do not. The security scheme must use di erent rules to handle the t...

Cloud computing has now become a very standardised concept in our society. However, many modern applications need better level of security that includes saving data from internal breaches. Thus, cloud databases effective mechanisms to keep track modifications. This paper will introduce the enhanced structure relational database (RDB) based on blockchain technology (BC) named BC over cloud-RDB. ...

National security has received unprecedented attention from academics, industrial leaders and the general public since September 11, 2001. The resulting worrying situation calls for solutions from a variety of promising areas, such as database technology. Additionally, traditional data management technologies (e.g., query processing and transaction management), data processing technologies (e.g...