Security on database systems and distributed databases

Summary form only given. Four aspects of information security on database systems are discussed: confidentiality (ensuring information is not subject to unauthorized disclosure); integrity (ensuring information is not subject to unauthorized and undetected modification); inference (ensuring information cannot be deduced from observable); and authentication (ensuring that the invokee of the message knows the invoker´s identity). These four aspects specific to distributed database systems are discussed for both message in the communication channel and data in the distributed databases