Concurrency Control and Security Issue in Distributed Database System
This paper reviews the security issues and concurrency control in distributed database system and data security aspects of client and server. As distributed database became more popular, the need for improvement in distributed database management system become even more important. The most important issue is security that may arise and possibly compromise the access control and the integrity of the system. In this paper, we propose some solution for some security aspects such as multi level access control, confidentiality, reliability, integrity and recovery that pertain to a distributed database system. This paper review some algorithm based of concurrency control such as basic timestamp algorithm, distributed two phase locking protocol (2PL) distributed optimistic protocol, wound wait algorithm.